By sub01

I was startled.  "Mine?"

"Of course.  You didn't expect to get off without punishment, did you?  After all, you did violate my sweet little Mary without my permission."

I hadn't really thought about it.  I didn't want to be punished – not after seeing Mary's punishment – but I was also captivated by Carol and desperate to be allowed to fuck Mary.  So when Carol took my arm and guided me toward the punishment bench, I let her.

"So obedient," Carol observed with amusement.  "Just like your sister.  That bodes well for you here, Brian."

I didn't say anything.  I couldn't say anything.  Carol was urging me down now, guiding me to kneel over the punishment bench just like my sister had.  I did it reluctantly, though not with the ease of familiarity that Mary had.  I positioned myself lengthwise over the bench, the narrow padded top supporting me from my belly up to just below my neck.  My arms and legs were at the feet of the bench, my cock and balls dangling free just past the end of the bench.

Without a word Carol began strapping me to the bench, just like I had with Mary.  One strap binding my left arm to the bench, one strap binding my right.  She coaxed my knees forward until my bottom swelled out in full offering, my bottom cheeks stretched far enough apart to reveal my own defenseless anus, and then she looped straps around my knees and clipped them to the rear legs of the bench.  Finally she produced a collar just like Mary wore and fastened it around my neck.  It was a snug fit, and strangely comforting.  Before I knew what was happening, Carol bunched my hair together in the back and pulled my head up, tying my hair off to the back of my collar so I was forced to stare helplessly straight ahead.  Just like she'd bound my sister.

"Ow!" I said softly.

Carol chuckled.  "Oh hush, Brian.  That's nothing compared to what's coming."

Gulp.

"Now, since you're new to this, I'll only give you twenty punishment points.  And I'll even let you choose the instrument..."

I surveyed the items on the bed.  The riding crop, the paddle, the nipple clamps and weights, the strap-on dildo.  "The paddle," I told Carol softly.  It seemed like it would be the least painful.  And there was no way I was letting her get anywhere near me with that strap-on.

"Okay, the paddle it is."  Carol picked it up and swung it through the air playfully, making a soft "swishing" sound.  "Have you ever been paddled before, Brian?"

I shook my head.  Mary had spanked me a few times during our youthful games, but I'd never experienced anything more than that.

"Well, just remember to count.  And be sure to thank me, just like your sister did you."

"Yes ma'am, I wi--"  My words were cut short as Carol suddenly struck my bottom with the paddle.  My breath left me in a rush and I jerked forward against the bench.  Jesus, it hurt!

"I don't hear you counting, Brian."

"One!" I gasped.  My bottom burned just from the one blow.  "Th... thank you, ma'am."

"You're very welcome," Carol chuckled.  "Only nineteen more.  Maybe when we're done you'll remember to be more respectful of my property next time."

"Yes ma'am," I gasped.  "I will.  Thank you."

Carol chuckled and swung the paddle again.

"Ow!  Two, thank you ma'am!"

"Louder, Brian.  I want your sister to hear you."  And she struck me again.

"OWW!  THREE!  THANK YOU, MA'AM!"  I was nearly shouting, desperate to please Carol.  Imagining my sister hearing my cries doubled the strange arousal I felt.  Even though it hurt like hell, the paddling was also strangely arousing.  Carol began paddling me steadily now, each time pausing just long enough for me to count and thank her.  Each time the paddle landed on my bottom my erection throbbed, as if the pain in my bottom translated directly into erotic stimulation of my cock.  I would never have imagined that a paddling could be so sexual, but now I found it exciting me nearly as much as Carol's fingers had been when she'd stroked me earlier.

"OWW... FUCK!  TWELVE!  THANK YOU, MA'AM!"

As I knelt helplessly over the punishment bench, my head pulled up and my bottom smarting from the blows of the paddle, Mary came back into the bedroom and stood watching bashfully.  She had straightened her hair and makeup and put on lingerie: a sexy red and black silk basque that laced down the front, matching red and black panties and sheer black stockings.  I was so stunned by how sexy my sister looked that I forgot to count when Carol struck me again.

"What number is that, Brian?"

"Thirteen!  Thank you, ma'am!"  I blushed, embarrassed to speak to Carol that way with my sister watching.  It was silly, really.  Mary had done much, much more in front of me.

"Would you like another, Brian?"

I hesitated, my concentration torn between my punishment and my sexy sister.  For so many years I had imagined seeing Mary is just such sexy, revealing lingerie, and now I couldn't focus on anything but her.

"Brian?"

Carol's voice brought me back to my punishment.  "Yes ma'am?"

"I asked if you would like another."

"Oh.  Yes ma'am, please."  I still had seven remaining.

"Beg me."

I blushed.  "Please ma'am, may I have another?"

"Of course Brian," Carol chuckled.  "Here you go..."

CRACK!

"Ow!  Oh, shit!  Fourteen!  Thank you, ma'am!"

"Keep begging me."

"May I... may I please have another?"  My cheeks burned with shame at having to beg for another in front of my sister.

As Carol paddled me, I couldn't take my eyes off Mary.  She seemed as aroused by my plight as I had been by hers.  Oh how sexy she looked!  Her red and black silk basque was simply stunning.  The elegant lingerie was laced down the front and showed a tantalizing glimpse of the inner swell of her breasts.  The silky fabric was delicately embroidered with a flower pattern that repeated on her deliciously high cut panties, and the cups of the basque were outlined in lace and cut low enough to display a generous amount of Mary's modest cleavage.  She caught me staring and I blushed.  But I couldn't stop staring.  As Mary cocked her hips teasingly, modeling for me, I looked lower.  Thin black garters ran down from the bottom of her basque to the tops of her sheer black stockings, framing her panty clad crotch between.  Her panties were as sexy and revealing as her basque... black and red silk with flower embroidery, cut high enough on the thigh and snug enough at the crotch to leave little to my imagination.

"I think you brother likes your outfit," Carol observed with amusement.

It was true, I loved Mary's outfit.  In fact, I was more aroused than ever just looking at her in her lingerie, despite my aching, burning bottom cheeks.

"You have one more, Brian," Carol told me.  "Get ready... this one's really going to hurt."

I tensed against the blow, but even so when it came it took my breath away.  "OW!  FUCK!"  I arched my back, trembling with the burning pain.  It felt like my bottom was on fire, but at the same time I felt exquisite, overwhelming pleasure.  "Twenty, thank you ma'am!  May I... may I please have another?"

I wasn't sure why I asked for another, except that I was lost in the sensations.  Carol chuckled.  "Another, Brian?  No, I think twenty is enough for now."  She moved around in front of me and offered the paddle to my lips.  "You may kiss it, Brian."

I craned my neck forward and kissed the paddle, just like my sister had done earlier.  "Thank you, ma'am," I said softly.

Carol chuckled.  "You're quite welcome, Brian.  It was my pleasure.  I hope I get to do it again some time."  I hoped so too, thought I didn't say so.  "You may put the toys away," Carol told my sister with a smile.  "Leave the nipple clamps out, though... we might need those again."

With an obedient nod Mary turned and crawled, gathering the items from where they lay.  She set the nipple clamps on the nightstand and then returned the rest of the items to the cupboard by the bed.  As my sister returned the toys to their proper places, Carol moved behind me and gently stroked my aching bottom with her fingers.  She teased her sharp fingernails all over my buttocks, making me wince.  Then between my buttocks, tickling her fingernails up and down my crack before homing in to circle my defenseless anus.  I tensed, afraid she was going to try to penetrate me there, but finally she pulled her fingers away.

Mary and Carol were both behind me now, somewhere out of my sight.  I could hear them moving around softly.  They didn't speak.  I heard sounds... soft sounds.  Fingers on silk, caressing, teasing.  Then a familiar sound, one which made me flush with excitement.

Carol and my sister were kissing...

*    *    *

I twisted in vain in my bonds, trying desperately to see.  The sounds were unmistakable.  Carol and my sister were making out, and it wasn't a quick, innocent kiss.  It sounded like a long, passionate kiss, and I imagined that tongues involved.  I could hear them clearly and it nearly drove me mad to not be able to see.  I turned and twisted, but to no avail.

Then another sound.  The squeak of the bed springs, the rustling of the sheets.  Dear god, Mary and Carol were on the bed.  I could hear them moving together.  Embracing, maybe?  Still kissing?  Or more?  I listened intently but couldn't make out what they were doing.  For the longest time I knelt bound to the punishment bench, driven mad by the suggestive sounds coming from the bed behind me.  My mind raced will all sorts of nasty things they might be doing.  Was Mary going down on Carol?  Or vice versa?  Were they fingering each other?  God why wouldn't they say something?  Even better, why wouldn't they let me watch!?

I was just about to beg Carol to let me watch when I heard the bed squeak again.  A moment later Carol came around in front of me.  She was still dressed, but her cheeks were flushed now.  As I watched breathlessly she took the zipper of her dress between thumb and forefinger and poised to pull it down.

"Would you still like to see my breasts, Brian?"

"Yes!  Please!"

Carol teased the zipper down an inch.  "You'll do anything for me, won't you Brian?"

"Yes, anything!"

She pulled the zipper down still farther.  "You'll be my slave for the rest of the weekend?  You'll serve me alongside your sister?"

"Yes!"  I felt flushed with excitement.  Carol's zipper was down nearly to her navel now.

Carol eased the zipper down the rest of the way, till it was at her crotch with only an inch or so to go.  The front of her dress sagged open, revealing a tantalizing glimpse of exotically smooth skin.  The supple leather caught on the large swell of her breasts and stopped without quite unveiling them.  "Okay Brian, beg me."

I hesitated.  "Please, Carol?  Please let me see your breasts?"  She smiled but made no move to unzip any further.  "Carol, please!  Please, I'm begging you, let me see your beautiful breasts!  Please, I've waited so long!  I've dreamed about this!"

As I continued begging, Carol unzipped the last inch and shrugged her dress off.  I had imagined her in my dreams for years, but it was nothing compared with seeing her naked now.  She was slim and sexy, not a tan line on her fair skin, and her breasts... oh lord, her breasts!  I loved the shape and modest size of my sister's breasts, but Carol's were so large and so obviously lusciously soft.  She had beautifully prominent nipples, the kind that made me want to just suck on them.  Chuckling with amusement, no doubt enjoying the look on my face, Carol peeled her panties down and tossed them aside.  She was naked now except for her stockings.  Like my sister's her pussy was shaven smooth, her labia prominent and inviting.  Oh what I would give to suck on them, even just a little!

"Come over here and help me turn your brother around," Carol told my sister.  As Mary slipped off the bed behind me Carol moved close and bent down to grasp the front legs of the bench.  Her large breasts brushed my face, swaying gently.  As they struggled to turn the bench around with me on it, I couldn't help but extend my tongue and lick Carol's left breast.  Oh, how soft it was!  How deliciously large!  Her nipple swayed just within reach and I licked it too, then captured it between my lips and eagerly sucked.

"Oooh!  Brian, you little devil!"

They had me turned facing the bed now.  Carol let me suck on her nipple a moment longer and then she pulled away and straightened up.  I groaned to myself.  The fleeting taste had done nothing to satisfy my desire for her.

Without a word Carol moved onto the bed and lay back.  She was a perfect vision of sexuality, lying back in only her stockings, looking as if she was ready for a good fucking.  And here I was bound and helpless!  I looked to Mary, pleading with my eyes for her to release me.  But she didn't release me.  Instead she moved close.  Slowly, one by one, she unclipped her garters and then peeled her panties down and off.  She rubbed her panties on her crotch, gathering her juices, and then with a sly smile she held them to my mouth.

"Open wide, little brother..."

I opened wide and let my sister stuff her soaked panties into my mouth.  Immediately I started sucking on them eagerly, savoring Mary's musky taste.

"That'll give you something to do while Carol and I enjoy ourselves," my sister teased.

With that Mary turned and joined her lover on the bed.  I had a perfect view of Mary's full bottom and her shaven pussy as she leaned forward and kissed Carol.  Carol slipped her arms around Mary's neck and kissed her back, holding her close in a loving embrace.  I could see my sister's hands moving over Carol's body, slipping down to her crotch.  She penetrated Carol with two fingers, slipping them deeply into her lover's pussy as they kissed.  Carol obviously liked this.  She moaned into Mary's mouth and arched her back, rotating her hips so my sister could penetrate her deeper.

"Make love to me, Mary."  Carol's voice sounded husky, different than before.  "Make me cum, my little pet."

Mary placed her palm on Carol's mound and began rocking it back and forth gently as she finger fucked her.  It was intensely exciting to watch my sister pleasure her lover like this.  Soon it was obvious that Carol wanted more.  Mary broke the kiss and moved backward, kissing her way down Carol's body.  She planted her lips one by one on each of Carol's nipples, then kissed the supple valley between her lover's breasts.  Then lower, planting gentle kiss after gentle kiss as she moved down over Carol's belly and waist, then lower still to her mound.  Carol groaned with delight as Mary pressed her lips to her mound.

"Use your tongue, my pet.  Lick me good."

It sounded like my sister did lick her good.  I couldn't see very well now with Mary kneeling between Carol's legs, but I could hear the delight in Carol's voice as she moaned and whispered encouragement to my sister.  It didn't take long for Mary to have her lover at the brink of orgasm.  As Carol clutched my sister's head and pulled her mouth tighter to her crotch, Mary wet one finger and pressed it up into Carol's bottom hole, and two into her pussy.  With her other hand she reached up and began twisting and pinching Carol's right nipple.  It was all Carol needed, and with a grimace and a grunt she orgasmed.  She looked almost in pain but I knew it was exquisite pleasure.  She clutched at my sister's hair and bucked her hips upward, almost dislodging Mary's mouth from her pussy.

"Like that!  Just like that, Mary!  Keep licking!  Oh, my pet, just like that!"

Mary kept licking... and fingering, and pinching, and twisting, playing Carol's body with unmistakable familiarity.  I felt flushed watching Carol orgasm under my sister's stimulation.  Slowly she came down, her hips settling, her breathing calming, her moaning becoming a whisper as she spoke softly to my sister.  I couldn't hear what she said, though I tried.  I imagined they were loving things, perhaps thanking her for a job well done.

After a while Mary and Carol rolled apart.  While Mary lay back, her lips and face glistening with Carol's moisture, Carol sat up and smiled at me.  "Don't look so surprised, Brian.  Your sweet sister's learned a trick or two since the last time you were with her.  And not just with her lips and tongue..."

Carol rolled off the bed and rummaged in the bedside cupboard.  When she turned around again she held another large strap-on dildo and had a wicked smile on her face.  She stepped into the harness and strapped it on firmly as she came to me.  I watched apprehensively.  This dildo was bigger than the one she'd used on Mary earlier, about the same length but noticeably thicker.  As she held its base with one hand, making it jut out from her body as if it were a real erection, Carol took my sister's panties out of my mouth and then guided the tip of the cock to my lips.

"Kiss it, Brian.  Kiss the cock that's going to fuck your sweet sister."

I didn't want to kiss her fake cock at all, but I couldn't deny Carol anything.  I craned my neck forward and quickly kissed the tip of the cock.

"You can do better than that, Brian!" Carol chuckled.  "I want you to really kiss it.  Take the head into your mouth and feel how big it is.  I want you to imagine it plunging up inside your sister, opening her, fucking her..."

I did as Carol asked.  I parted my lips and let her guide the head of the cock into my mouth.  It really was big.  The thick head felt lewd in my mouth, and I felt strangely jealous that it would be first into my sister's pussy and not my own cock.  Funny, that I could be jealous of an inanimate object.  I was suddenly worried that Carol was going to make me suck the cock, something I definitely didn't want to do, but to my relief she pulled it away.    Smiling down at me, her strap-on cock jutting out lewdly, Carol rubbed my sister's panties along her own slit and then pressed them back into my mouth.  The taste was a bit different now, a mixture of their juices.  Oh, sweet heaven...

"Now, watch and be quiet, Brian.  Perhaps later you'll get a chance to do as I do."

With that Carol remounted the bed and moved between my sister's legs, her cock dangling lewdly.  There was no pretense, no making Mary suck it to get it ready.  I knew as well as Carol obviously did that my sister was wet and ready.  Carol guided her cock with one hand, nudging its thick head between my sister's pussy lips.  From my vantage point behind them I had a perfect view of their impending joining, and of my sister's eager face behind.

"Beg me for it, Mary."

My sister needed no encouragement.  "Oh God, fuck me Carol!  Please, fuck me hard!  I'm so fucking horny!  Take me like the slut I am--aaahhh!"  Mary groaned as Carol sank the dildo home, forcing it into her pussy in one swift stroke.  "Ohhhh!"

"Like it?"

"I love it!" Mary gasped.  "Fuck me, Carol!  Hard!"

"First put your hands on the headboard."

Mary did it quickly, reaching out above her head and grasping the headboard.  "Now don't you dare let go," Carol told her as she began thrusting.  Mary didn't answer.  Her face was filled with delight as the strap-on sank home, then withdrew.  Then sank deep again.

Carol fucked my sister with long, hard strokes.  This wasn't a slow, tender loving like I had so often imagined, but a hard fast fuck.  It was obviously what my sister wanted.  Her arms strained as she clutched the headboard, her legs flexed, her face contorted in a look of pleasure and lust.  She arched her hips up so Carol's cock could penetrate her deeper, and when it did she grunted with delight.

I was beside myself watching Carol fuck my sister with the strap-on.  If I had been loose I would have mounted Carol from behind and fucked her while she fucked my sister.  But I was helpless to do anything but watch.  Soon Mary wrapped her legs around Carol and pulled her closer, trapping her with the cock thrust deep into her pussy.  Carol sagged down onto my sister and they rocked together for a moment, kissing and whispering to each other.  Carol stroked Mary's hair and rocked her hips gently, fucking my sister at full penetration.  Then, slowly, she withdrew.

"Get down on the floor.  In front of your brother..."

Mary rolled off the bed and knelt down in front of me.  She was flushed and breathing heavily, and when she looked at me I could see the lust in her eyes.

"No, closer," said Carol as she came over behind Mary.  "Right there."  She pushed Mary forward onto her hands and knees, forcing my sister's face close to mine.  "Kiss him, and don't stop until I tell you to."

Mary smiled at me and pressed her lips to mine.  As we began to kiss Mary's eyes widened and she groaned into my mouth.  I couldn't see, but I knew Carol had penetrated her with the strap-on.

"Oh God, Brian!"  Mary's words were but a muffled whisper against my mouth.

"I said kiss him!" Carol said as she pushed my sister's head forward, forcing our mouths together.  "No talking!"

We didn't talk any more.  We kissed, attacking each other eagerly with our lips and tongues even as Mary began rocking into me, propelled forward by Carol's thrusts.  I could feel each thrust through Mary's lips, feel how she gasped and twitched with each penetration, how she tensed at each withdrawal as if desperate to keep the cock inside her.  Carol fucked her hard and fast, using her like she had on the bed.  Only now it was from behind, and I was the lucky recipient of Mary's lustful kisses.

"Do you like this, Mary?" Carol crooned.  "Do you like this, you little slut?  I'll bet you wish this was your brother's cock fucking you like this, so deep and hard..."  Mary nodded desperately at each one of Carol's teasing comments, each time grunting as Carol drove the dildo home.

The fucking ended all too soon for me.  Carol's thrusts slowed, then stopped.  Mary groaned into my mouth as Carol withdrew from her, and then she was drawn back and our lips parted reluctantly.  As I watched breathlessly, Carol unbuckled the strap-on and helped my sister into it.  I couldn't believe how sexy Mary looked with the cock jutting out from her hips.  She caught my eye and smiled sheepishly.  Then she joined Carol on the bed.

Mary lay back on the bed again, this time with the cock standing straight up from her crotch.  Carol mounted her and sank slowly down on the thick phallus, guiding it with one hand while supporting herself with the other on my sister's chest.  "Oohhhh..."  Carol groaned softly as their thighs touched.  I could see that the cock was in her deep, the thick base forcing her pussy lips apart.

Carol began riding atop my sister, grinding her hips forward and back and then in circles, levering the cock around inside herself.  Before long Mary was humping upwards, driving the cock into Carol's pussy.  Carol seemed to love this and began rising and falling in time to the thrusts, letting the cock ease almost all the way out before settling down on it again.  As she fucked herself on my sister's cock, she leaned forward and pressed her luscious breasts to Mary's face.

"Mmmm... oh, just like that, Mary... lick me just like that!"  I couldn't see, but by the sounds of it Mary was licking her breasts now.  Probably even biting her nipples, judging by how Carol gasped every now and then.  They writhed and thrust together, fucking against each other eagerly.  Mary's arms were around Carol now, holding her close.  She had one hand on Carol's back and the other on her bottom, and as I watched in fascination she teased her fingers between Carol's bottom cheeks and pressed one finger right up into her bottom hole.  The reaction was instant.  Carol groaned and humped harder against my sister's cock.

"Oh Jesus, Mary... you're going to make me cum again!"

"Then cum, you slut!" came Mary's muffled voice from between Carol's breasts.  I was shocked to hear her speak like that, so aggressively.  "Cum on my cock!"  As she said it she raked her fingernails down Carol's back, leaving faint red scratches.

"I'm cumming!" groaned Carol.  "Oh God, I'm cumming again!"  She was trembling gently as she rocked atop my sister.  Mary coaxed her through her orgasm, pushing her finger in and out of Carol's bottom, scratching her back with her fingernails and sucking eagerly on her breasts, all while thrusting with her cock.  It was a powerfully erotic scene, so much more so than any I had imagined them in.  Oh, if I could only be on that bed with them!

After a while they slowed their fucking, then stopped.  Carol lay atop my sister for the longest time, the strap-on cock still buried deep in her pussy.  Finally she eased off it and moved downward, taking her breasts from Mary's mouth so she could kiss her.  They looked like two intimate lovers now, red faced and flushed, kissing and caressing each other gently.  Soothing each other.  Loving each other.

Even when they rolled apart they remained lying together, side by side.  Mary un-strapped the dildo and set it aside, then lay quietly stroking Carol's arm, gazing at her dreamily.  I was beginning to think they had forgotten about me when Carol sat up and gave me a teasing grin.

"Come on Mary, I think we've teased your poor brother long enough.  Help me untie him and get him up here on this bed."