This is the story of my seventeenth birthday. On this particular day which happened to be on a Wednesday night thus eliminating a party, my mom had to work the late shift. I wasn't expecting a surprise party until the weekend, maybe. My girlfriend Cheryl had other plans to surprise me though. That goal would be difficult however, since we were extremely open and had great variety in our sex life already. We are both bisexual, have had more than a couple manage-a-trois, and have explored many different aspects of our sexuality. On this summer day Cheryl had taken me out for ice cream and we were walking home when I asked her what was in her gym bag that she was carrying.

"Never mind!" she coyly replied.

When we arrived at my place I looked around to see who was home. My younger sister Gina was in her room reading. Gina was fifteen going on sixteen and has an unbelievable body. She bloomed early. Like Cheryl, Gina had big round, very firm breasts, a tiny waist, strong, smooth legs and a tight, mouth watering arse. Cheryl is about 5'3" and Gina is 5'1". Gina has brown eyes, black curly hair and full lips where Cheryl has blue eyes, short, blond hair, thin lips and more sculpted features. My relationship with my sister is another story but let's say we are much closer than the average brother and sister. Gina's great tan showed because she was wearing just cut-offs and a tee shirt. I told her that Cheryl and I would be downstairs and might be "busy". I then went downstairs and told Cheryl that we were more or less alone and she excused herself to go upstairs to freshen up. A great deal of time passed , at least twenty minutes, and my girlfriend was still upstairs. I was getting rather suspicious so I called up to her to see if everything was alright. She yelled down for me to stay put as she was preparing my birthday gift. I of course stayed put. About five minutes later I heard loud footsteps coming down the stairs and a lot of 'jingling' and 'rattling' noises. Then to my amazement there stood before me my birthday present.

I almost didn't recognize her, but Cheryl was standing in front of me in long black leather boots with five inch heels. She was also wearing black fishnets, high cut leather panties, leather push-up bra, black gloves, leather jacket and a 'nazi' style biker hat. She was also covered in chains and zippers and adorned a cat-o-nine-tails whip in one hand and a dog leash in the other. On the end of the leash was my sister in a dog collar. Gina was dressed in her shorty blue robe with a lacey, black bra and garter belt on. She had seemed, charcoal nylons on with no shoes. A red g-string barely covered her short, black pubic hairs. Gina was handcuffed and wore a ball gag in her mouth. Both of them had dark eyelashes, ruby red lips, and generally severe make-up.

Cheryl cracked her whip, "Take those cloths off right now dink!"

I did as commanded. She then gave Gina a sharp thrash across the bum. Gina stood up. Cheryl grabbed the back of Gina's g-string and pulled up hard on it making it spread her cunt lips until it hurt.

"I can't wait for this dink," she claimed as she pulled the crotch of her panty aside and commanded my sister, "Don't just stand there, eat my cunt!"

Cheryl released the ball gag and pushed Gina down on her knees. Gina clamped her mouth on my girlfriend's clit. My cock was fully erect now. I stood there stark naked. I watched Gina's tongue licking frantically at Cheryl's wet twat as she parted it with her gloved fingers. Cheryl whipped Gina's arse a couple more times to encourage her performance. I looked in Cheryl's darkly colored eyes as she was being eaten. I could tell that she was on the verge of coming when she tugged at Gina's black curls pulling her from her dripping cunt.

"Your turn dink!" she demanded.

I got down on my knees and shoved my face into her beautiful blond bush. I was greeted by a smack on the arse with the lash. It stung hard but I lapped harder at the wet twat that lingered with the aroma of Gina's perfume. I sucked on her clit and tongued her hole as the lash smacked my bum again.

"Much better!" she soothed as her hips ground into my face. She pulled on the leash telling Gina to suck my cock. My moans of pleasure were muffled by Cheryl's bush as my little sister opened her wet mouth, taking in my red-hot member. She was very talented for her age, sucking my cock like a pro. Cheryl continued whipping both our asses. My butt was burning. Then I was drinking Cheryl's oozing juices as she came.

My girlfriend now positioned herself behind Gina and used the handle of the whip which was shaped like a black cock, on my sister. First she pulled on the g-string until it tore right off Gina's crotch. She then jammed the handle into Gina's already soaking box. Cheryl fucked her hard and spanked her cheeks leaving red hand prints on her arse. It was all too much for me as a wave came over me and I poured a fountain of cum into Gina's mouth. I shot at least a quart of which she caught some, but most ended up all over Gina's face and dripped from her chin. This angered my girlfriend as she pulled the lash out and smacked me three times with it.

"That's supposed to be mine," she claimed, pulling Gina up to her face.

I watched intently as the two kissed with open mouths and tongues entwined sharing the sperm between them. As they kissed passionately, Cheryl inserted the dildo back up Gina's cunt. One of Cheryl's fingers found its way up my baby sister's bum. Gina moaned and kissed harder pressing her tits hard against my girlfriend. My cock was fully erect again. Cheryl pushed Gina away and told me to clean her face. I gratefully licked wildly for about five minutes, eating my excess cum. Next, Cheryl rolled me over and took off the glove on her right hand. Pulling out a tube of K-Y from her coat pocket she lubed her fingers up. I could anticipate what was going to happen and was very excited. As Gina began masturbating while on hands and knees with the lash hanging out of her cunt I leaned forward and put my face in her butt, licking her pert little arsehole. She loved it. As I licked her rectum my girlfriend gently inserted two fingers up my bum.

"Do you like that, huh fag?" she asked. "Is that how big your cock is? No, bigger?"

With that she entered another finger. It stretched my hole.

"Still not the same as your cock, is it?"

With that she pushed her small finger in my bum making it four total. I continued tongue fucking my sister's arsehole.

Cheryl's greasy fingers pumped away at my sore arse.

"I bet you can take my whole hand," she claimed as she guided her thumb inside and pushed her hand slowly all the way up my arse. My tongue was half way up Gina's bum as my mind reeled in pleasure and pain. Cheryl fist fucked my arse in amazement as Gina was getting off finally on my tongue and the dildo handled whip. After fist fucking me for five to ten minutes Cheryl finally pulled it out and screamed, "Fuck me right now!"

I shoved my meat in her and fucked her hard. She was wet as I fucked her pussy frantically. Gina grabbed the whip and started whipping my already red arse.

"Excellent!" Cheryl cried as she orgasmed, digging her nails into my shoulders.

After recovering she crawled back on the couch telling Gina to come to her. Gina buried her face in Cheryl's breasts sucking her nipples. I crawled up between my sister's legs rubbing my slick cock in the crack of her bum. Cheryl winked as I got the hint. I pressed the head hard on the opening of Gina's arsehole. Leaning forward, I opened her sphincter muscle. It entered easily as my sister sighed heavenly.

Cheryl whipped me again, "Fuck her arse!"

"Yes, baby!" cried Gina. She was so tight that it felt great. It was the most unbelievable sensation. I fucked her bum long and hard until I couldn't hold on any longer. I pumped another load of cum up my baby sister's hot arse. Her hips bucked as I seen her and Cheryl kissing frantically. I pulled out and dropped down and sucked my cum from her arse. Cheryl came down and helped lick the cum from Gina's thighs and from my cock. She sucked it clean. We then kissed, savouring all the flavours. We kissed with mushy lips and tongues.

"Stick that tongue up my arsehole right now!" demanded my girlfriend.

This was new for her, as I had never seen her like this before. I loved it. Cheryl rolled over and grabbed my head, pushed my face into her crack and writhed her bum against my hard tongue. Without coaxing, I jammed my mouth muscle up her tight hole and tried to fuck it. She rode my tongue for a while then grabbed my hair and pulled me up.

She kissed me hard and said, "Come on, fuck it! If you think you can?"

No problem. I pushed my rejuvenated pole against her virgin hole. With a long moan it went all the way in. Cheryl bit her bottom lip. "Do it!" she continued.

I was amazed at her versatility. I fucked faster and faster. I pulled at Cheryl's hips and she pushed her bum back at me. I couldn't believe I was fucking her virgin bum so hard and fast and she was loving it a lot. I was enjoying it earnestly and decided to rub her clit with my fingers. This sent her to seventh heaven. Her fingers joined mine and together we masturbated her pussy while my long, wide shaft stroked her arsehole. As I was in ecstasy my sister grabbed the cat-o-nine-tails and smacked it across my arse a couple of times. As it slapped my red arse Cheryl screamed as she came. Her orgasm was intense and long. Soon I was coming too and shot yet another load of white stuff up Cheryl's bum. I passed out from exhaustion.

After I came to, the girls were changed back into their regular cloths. My dick was spent and my arse was raw and red. The girls looked as if they had been through a war. They could barely sit down but had sheepish grins on their faces.

"Did you enjoy your birthday present?" Cheryl asked.

I was almost speechless. "That was one of the sickest, most depraved things I had ever done... and I loved it, thank you!"

I can't wait for Cheryl's birthday.

This is the story of my seventeenth birthday. On this particular day which happened to be on a Wednesday night thus eliminating a party, my mom had to work the late shift. I wasn't expecting a surprise party until the weekend, maybe. My girlfriend Cheryl had other plans to surprise me though. That goal would be difficult however, since we were extremely open and had great variety in our sex life already. We are both bisexual, have had more than a couple manage-a-trois, and have explored many different aspects of our sexuality. On this summer day Cheryl had taken me out for ice cream and we were walking home when I asked her what was in her gym bag that she was carrying.

"Never mind!" she coyly replied.

When we arrived at my place I looked around to see who was home. My younger sister Gina was in her room reading. Gina was fifteen going on sixteen and has an unbelievable body. She bloomed early. Like Cheryl, Gina had big round, very firm breasts, a tiny waist, strong, smooth legs and a tight, mouth watering arse. Cheryl is about 5'3" and Gina is 5'1". Gina has brown eyes, black curly hair and full lips where Cheryl has blue eyes, short, blond hair, thin lips and more sculpted features. My relationship with my sister is another story but let's say we are much closer than the average brother and sister. Gina's great tan showed because she was wearing just cut-offs and a tee shirt. I told her that Cheryl and I would be downstairs and might be "busy". I then went downstairs and told Cheryl that we were more or less alone and she excused herself to go upstairs to freshen up. A great deal of time passed , at least twenty minutes, and my girlfriend was still upstairs. I was getting rather suspicious so I called up to her to see if everything was alright. She yelled down for me to stay put as she was preparing my birthday gift. I of course stayed put. About five minutes later I heard loud footsteps coming down the stairs and a lot of 'jingling' and 'rattling' noises. Then to my amazement there stood before me my birthday present.

I almost didn't recognize her, but Cheryl was standing in front of me in long black leather boots with five inch heels. She was also wearing black fishnets, high cut leather panties, leather push-up bra, black gloves, leather jacket and a 'nazi' style biker hat. She was also covered in chains and zippers and adorned a cat-o-nine-tails whip in one hand and a dog leash in the other. On the end of the leash was my sister in a dog collar. Gina was dressed in her shorty blue robe with a lacey, black bra and garter belt on. She had seemed, charcoal nylons on with no shoes. A red g-string barely covered her short, black pubic hairs. Gina was handcuffed and wore a ball gag in her mouth. Both of them had dark eyelashes, ruby red lips, and generally severe make-up.

Cheryl cracked her whip, "Take those cloths off right now dink!"

I did as commanded. She then gave Gina a sharp thrash across the bum. Gina stood up. Cheryl grabbed the back of Gina's g-string and pulled up hard on it making it spread her cunt lips until it hurt.

"I can't wait for this dink," she claimed as she pulled the crotch of her panty aside and commanded my sister, "Don't just stand there, eat my cunt!"

Cheryl released the ball gag and pushed Gina down on her knees. Gina clamped her mouth on my girlfriend's clit. My cock was fully erect now. I stood there stark naked. I watched Gina's tongue licking frantically at Cheryl's wet twat as she parted it with her gloved fingers. Cheryl whipped Gina's arse a couple more times to encourage her performance. I looked in Cheryl's darkly colored eyes as she was being eaten. I could tell that she was on the verge of coming when she tugged at Gina's black curls pulling her from her dripping cunt.

"Your turn dink!" she demanded.

I got down on my knees and shoved my face into her beautiful blond bush. I was greeted by a smack on the arse with the lash. It stung hard but I lapped harder at the wet twat that lingered with the aroma of Gina's perfume. I sucked on her clit and tongued her hole as the lash smacked my bum again.

"Much better!" she soothed as her hips ground into my face. She pulled on the leash telling Gina to suck my cock. My moans of pleasure were muffled by Cheryl's bush as my little sister opened her wet mouth, taking in my red-hot member. She was very talented for her age, sucking my cock like a pro. Cheryl continued whipping both our asses. My butt was burning. Then I was drinking Cheryl's oozing juices as she came.

My girlfriend now positioned herself behind Gina and used the handle of the whip which was shaped like a black cock, on my sister. First she pulled on the g-string until it tore right off Gina's crotch. She then jammed the handle into Gina's already soaking box. Cheryl fucked her hard and spanked her cheeks leaving red hand prints on her arse. It was all too much for me as a wave came over me and I poured a fountain of cum into Gina's mouth. I shot at least a quart of which she caught some, but most ended up all over Gina's face and dripped from her chin. This angered my girlfriend as she pulled the lash out and smacked me three times with it.

"That's supposed to be mine," she claimed, pulling Gina up to her face.

I watched intently as the two kissed with open mouths and tongues entwined sharing the sperm between them. As they kissed passionately, Cheryl inserted the dildo back up Gina's cunt. One of Cheryl's fingers found its way up my baby sister's bum. Gina moaned and kissed harder pressing her tits hard against my girlfriend. My cock was fully erect again. Cheryl pushed Gina away and told me to clean her face. I gratefully licked wildly for about five minutes, eating my excess cum. Next, Cheryl rolled me over and took off the glove on her right hand. Pulling out a tube of K-Y from her coat pocket she lubed her fingers up. I could anticipate what was going to happen and was very excited. As Gina began masturbating while on hands and knees with the lash hanging out of her cunt I leaned forward and put my face in her butt, licking her pert little arsehole. She loved it. As I licked her rectum my girlfriend gently inserted two fingers up my bum.

"Do you like that, huh fag?" she asked. "Is that how big your cock is? No, bigger?"

With that she entered another finger. It stretched my hole.

"Still not the same as your cock, is it?"

With that she pushed her small finger in my bum making it four total. I continued tongue fucking my sister's arsehole.

Cheryl's greasy fingers pumped away at my sore arse.

"I bet you can take my whole hand," she claimed as she guided her thumb inside and pushed her hand slowly all the way up my arse. My tongue was half way up Gina's bum as my mind reeled in pleasure and pain. Cheryl fist fucked my arse in amazement as Gina was getting off finally on my tongue and the dildo handled whip. After fist fucking me for five to ten minutes Cheryl finally pulled it out and screamed, "Fuck me right now!"

I shoved my meat in her and fucked her hard. She was wet as I fucked her pussy frantically. Gina grabbed the whip and started whipping my already red arse.

"Excellent!" Cheryl cried as she orgasmed, digging her nails into my shoulders.

After recovering she crawled back on the couch telling Gina to come to her. Gina buried her face in Cheryl's breasts sucking her nipples. I crawled up between my sister's legs rubbing my slick cock in the crack of her bum. Cheryl winked as I got the hint. I pressed the head hard on the opening of Gina's arsehole. Leaning forward, I opened her sphincter muscle. It entered easily as my sister sighed heavenly.

Cheryl whipped me again, "Fuck her arse!"

"Yes, baby!" cried Gina. She was so tight that it felt great. It was the most unbelievable sensation. I fucked her bum long and hard until I couldn't hold on any longer. I pumped another load of cum up my baby sister's hot arse. Her hips bucked as I seen her and Cheryl kissing frantically. I pulled out and dropped down and sucked my cum from her arse. Cheryl came down and helped lick the cum from Gina's thighs and from my cock. She sucked it clean. We then kissed, savouring all the flavours. We kissed with mushy lips and tongues.

"Stick that tongue up my arsehole right now!" demanded my girlfriend.

This was new for her, as I had never seen her like this before. I loved it. Cheryl rolled over and grabbed my head, pushed my face into her crack and writhed her bum against my hard tongue. Without coaxing, I jammed my mouth muscle up her tight hole and tried to fuck it. She rode my tongue for a while then grabbed my hair and pulled me up.

She kissed me hard and said, "Come on, fuck it! If you think you can?"

No problem. I pushed my rejuvenated pole against her virgin hole. With a long moan it went all the way in. Cheryl bit her bottom lip. "Do it!" she continued.

I was amazed at her versatility. I fucked faster and faster. I pulled at Cheryl's hips and she pushed her bum back at me. I couldn't believe I was fucking her virgin bum so hard and fast and she was loving it a lot. I was enjoying it earnestly and decided to rub her clit with my fingers. This sent her to seventh heaven. Her fingers joined mine and together we masturbated her pussy while my long, wide shaft stroked her arsehole. As I was in ecstasy my sister grabbed the cat-o-nine-tails and smacked it across my arse a couple of times. As it slapped my red arse Cheryl screamed as she came. Her orgasm was intense and long. Soon I was coming too and shot yet another load of white stuff up Cheryl's bum. I passed out from exhaustion.

After I came to, the girls were changed back into their regular cloths. My dick was spent and my arse was raw and red. The girls looked as if they had been through a war. They could barely sit down but had sheepish grins on their faces.

"Did you enjoy your birthday present?" Cheryl asked.

I was almost speechless. "That was one of the sickest, most depraved things I had ever done... and I loved it, thank you!"

I can't wait for Cheryl's birthday.