It's been a year since our parents died, Joy and I have slipped into a routine; a slutty routine. Joy is upstairs slipping into a whore uniform for another trip to the sleazy downtown adult porno shop that we love so much. I am talking to Tammy our Guardian cousin. It's a three day weekend coming up, so she is going away with her boyfriend and making sure it's okay with me. As usual I convince her everything will be fine.

"Joy and I are just going to hang around the house this weekend." I tell Tammy innocently, leaving out the part where I'm going to have Joy tied up in some brutal manner.

I plan on using Joy pretty hard tomorrow, so I'll have to keep an eye on her at the bookstore. I don't want her going cock crazy with too many perverts.

Sometimes I'll leave her alone in the back of the store and go and talk to Marty the store owner. I'll have to run back and save her from some pervert who is twisting her nipples too hard, or slapping her too much, or something else equally painful.

One time I caught a guy burning her tits with a cigarette. The burns aren't too bad, but it still angers me that more thought wasn't put into it. I burned the word SLUT just over her pussy a little while ago, now that was a great session and it looks hot. It's not like these perverts are abusing her, she begs for everything they do.

If I don't give her a good pain and orgasm session regularly, she tries to sneak away and find some pervert to give her one. Thank goodness when she does slip away, she only comes home with bruises and worn out fuck holes. I know if I don't keep an eye on her she'll wind up dead; probably with a smile on her face.

Joy's point of view.

Should I wear a short skirt with no panties, or a pair of short shorts that dig into my crotch. I know, I'll wear a pair of shorts that I don't mind losing and a belt with a padlock, then they'll have to rip the shorts from my body.

I am going to wear my tight tube top so it can hold a couple of thumb tax in my nipples. No wait, if I do that Candy might be angry and not play with me this weekend. I don't care I'm going to do it anyway.

"Okay slut, you can come down now, Tammy is gone!" I screamed from the bottom of the stairs.

What is the slut up to, I can clearly see the thumbtacks under the thin fabric of her tight tube top. She's tried this before, I make her believe it angers me. The truth is as long as they're not sharp enough to make her bleed I love when my sister is her pain loving self. The padlock holding her belt is definitely new.

"What is the meaning of this, you want those perverts to rip your clothes off?" I said yanking on the small padlock.

"Yeah, I thought it would be pretty hot. What do you think?" Said Joy, giving me a slutty pose.

"I guess I'll have to bring another change of clothes you fucking slut. Now about these thumbtacks, they better not be the ones that draw blood." I said calmly while pushing my thumbs into the two thumbtacks giving my sister the pain she craves.

"Oh yes that feels so good." Said Joy rubbing her pussy through the thin fabric of her short shorts.

"Are these thumbtacks going to draw blood or not? If they do we are not going to the bookstore, I'm not giving you a session tomorrow. Instead I'm tying you up downstairs with a dildo strapped in your pussy. I'll spend the whole day flicking rubber bands at your tits but never allow you to orgasm." I scolded her while pushing a little harder on the thumbtacks and checking her tight white tube top for signs of blood.

"No I promise, they are the plastic ones, they won't draw blood I swear. Moaned Joy rubbing her pussy harder. I stopped her before she could orgasm. I want her hot and horny when we get to the bookstore.

I made a deal with a cab driver we met at the bookstore one night. He would give us free rides into town and Joy would give him free head all the way there. He has never been late when we call for a ride; Joy must give good head.

Because we are so young things have been a little crazy at the bookstore lately, so things have to be set up in advance with Marty. He has been closing the store when he knows we're coming. Only pedophile perverts are there waiting for us. They will act as if there patrons of the store, looking at magazines and such when we arrive. This is more for Joy's benefit. She likes making an entrance, walking up to every pervert she sees and letting them feel her up. This is what led to so many horny perverts showing up at Marty's store. Once she's in a heightened state of sexuality, she would rub her moist pussy on a policeman's leg if she thought it would get her pussy pounded over the hood of his car. Then she would be surprised when she ended up handcuffed in the back of the police car. Marty knows how slutty Joy can get and thinks it's safer if none of his customers know how old the slut in the glory hole booth is.

While she flirts with the perverts in the bookstore. I talk to Marty about a road trip we were planning for the little slut. Marty tells me he knows of a biker bar where Joy would meet plenty of guys that are willing to treat her the way she wants. I know she'll need a long time to recover so I'm planning a cover story about some girl that beats her up after school.

Joy's point of view.

I wish Candy wouldn't have made me remove the thumbtacks. Oh well, these perverts seem to be twisting my nipples just right. There only seem to be four or five guys here today. I hope there's more in the back.

"Hey bitch what's up with the padlock? Where's the key, I'm ready for a taste of this pussy." One of the nameless perverts mentioned as he tugged on the padlock.

"I didn't bring the key mister, I'm not here to get laid, I'm just here to shop for a new dildo." I said bending over to check out the bottom row of dildos. I made sure not to bend my knees so the thin strip of denim cut through my pussy lips just right. I love teasing the perverts, it makes it more likely they'll treat me roughly. It only took a second for the guy to grab my shorts and start ripping them from my body. The initial shock is so exciting. Here comes the orgasms I crave so much. The rest of the guys get in on the act and soon I was standing there wearing only the belt with the padlock around my waist and my stripper shoes.

"You don't need a new dildo baby, there are plenty of cocks here to satisfy your pussy." Said another of the nameless studs, twisting my nipple so good.

"Check out the branding." One guy said to another. He must be new to the bookstore; he's in for a slutty surprise.

Soon the small padded bench that I know so well was brought out and placed in the middle of the store. I'm laid out on the bench surrounded by porno mags, videos, and sex toys. Soon I'm being pounded like the slut I am. My first orgasm is building quickly, I know it could be my best of the night so I started begging for the pain that accompanies my orgasms so well.

"Please, twist my nipples, smack my face. Even better, pull out your knife and cut me." I said to one of the guys hoping he had a knife. "Treat me like the pain loving fuck hole I am."

Candy walks from the front of the store.

"Nobody's pulling a knife and cutting anybody. I know what the slut needs, just keep fucking her." I tell the pervert between Joy's legs. "You guys hold her legs apart." I began smacking Joy's clitoris with medium hard smacks. Her orgasm comes quickly.

"Oh my God, yes, yes, do it harder, please do it harder mistress!" Joy begs as her orgasm washes over her. I don't listen to her begging, I don't want her body bruised here at the bookstore. I'll save that for tomorrow's session in our dungeon.

The four perverts pound Joy's slutty body hard for the next 45 minutes. She continues begging for harder treatment and I am there to stop it. I have no doubt these guys would beat the crap out of her at her insistence. It's a good thing I'm here to keep an eye out for her.

Watching Joy used like the slut she is turns me on, so I break out a small vibrator that I brought with me. I bring myself to a couple of small orgasms watching Joy lose her mind.

Sometimes it makes me jealous knowing my little sister has much more powerful orgasms than I do. Whenever I feel this way I'll tease her with a gentle touch. It's funny watching her get angry at being caressed in a way most people would love.

When the guys are finished using her and getting dressed to leave. Joy is rubbing her little clitoris through the gobs of man juice begging for one more orgasm. The little tramp can't get enough.

Marty says that he has to reopen the store. There are a line of horny perverts outside waiting to get in.

"Okay what do you sluts want to do? You have to either sneak out the back, or if the little slut wants more cock we can lock you sluts in one of the video booths and you can have fun at the glory hole. So what's it going to be?" Marty asks.

"Come on Candy let's stay a little while longer, I need more cock." Joy begs. She looks so cute holding her hands together in a praying motion.

What the hell, I could use some cock myself. Marty escorts us in the back of the store and locks us in the large video booth that has two glory holes, one on each side of the booth.

Joy immediately bends over and places her slimy ass against the hole in the wall. She is all smiles with anticipation. I on the other hand I like to see the cock I am about to fuck. The TV screen comes alive to a scene where a young girl is gang banged; my favorite. We only have to wait a minute or two for the first of many cocks.

Joy is the first to get cock through her hole in the wall. I see her face contort in agonizing pleasure as the cock enters her used pussy. She reaches back and grabs the handles for leverage. You can see the whole wall shake as the faceless cock pounds her pussy.

Soon a nice big black cock pokes through the hole on my side of the wall. I stroke and lick the cock in front of me. I want it nice and wet before I back my pussy onto it. When I'm satisfied the cock is ready I slowly back my pussy onto it. The guy fucking me knows to take it easy until I get used to it. My pussy is not a slimy mess like my little sisters. After a few strokes I am also grabbing the handles on my wall for leverage. Now we are both getting a good pounding.

Joy and I are face-to-face so we begin kissing each other. When I know she's close to orgasm I bite her lower lip and push her over the edge. Sometimes her orgasms are so powerful she will fall to the floor. It's funny watching the large cock that was just in her pussy, stuck through a hole in the wall spewing its load all over her convulsing body.

After I've had my fill of cock (no pun intended) I'll spend the rest of the time helping Joy achieve orgasmic nirvana. I twist her nipples or slap her when she's ready to cum. I'll suck off the cocks that come through my side of the wall and spit the loads of cum on Joy's face. I like when Joy looks like the slut she is.

When I've had enough and it's time to leave. I'll take a small Polaroid camera out of my purse. Take a couple of pictures of Joy covered in sperm and acting like a slut. I like to stick these pictures on the wall and write a message next to them. (Slut Joy had 20 cocks at the glory hole today.) These type messages are written all over the glory hole booth, but when accompanied with a picture of the slut covered in cum it's way more exciting, especially when we come back and the pictures are gone. I like to think some pervert is jerking off to those pictures somewhere.

I use my cell phone to call Marty to unlock the booth. He is all smiles when he sees Joy covered from head to toe in man juice. He likes the pictures to, I think it increases his business to know there is a hot slut that shows up here once in a while for a hot fuck session.

I thought I would let Joy sleep in on Saturday morning. I wanted her well rested for what I had planned. By 10 AM the slut had rolled into the kitchen wanting to know what I had planned. She was wearing a wife beater T-shirt barely long enough to cover her pussy.

"So what are you going to do to me today sis? How about needles through the pussy again, I really liked that. You could whip me with the bamboo, I know it leaves marks and everything but so what, I like it." Mumbled Joy with those puppy dog eyes almost begging me. She talks about me beating the crap out of her with the bamboo pole like it's nothing.

The one time I smacked her pussy good with that bamboo pole it did some real damage. She begged me to keep going; of course. It made her cunt black and blue and all puffy for a week. She wore the tightest shorts after that, she loved the agony when she walked.

"No my slutty sister, I'm not beating you with the bamboo this weekend, but I am going to make your pussy nice and puffy." I said watching Joy get that excited look on her face that I've seen so much. "I'm going to finally give you your wish and use the vacuum equipment we have to pump that pussy and those little boobs." I said to my excited sister.

The first time we found the vacuum equipment we didn't know what it was for. But the videos always taught us. We finally came across the video where the slave that called the dungeon home, had the vacuum equipment used on her. The transformation was incredible.

Her master husband first started on her small tites. He injected each mammary with a special compound not legal in the United States. Then he connected two suction cups, one to each tit and vacuum all the air out. She moaned when her tits filled the suction cups and doubled in size. It took a few sessions, increasing the size of the suction cups each time. By the time she was done she had impressive double D's. He only did one session with her pussy, increasing its size just a little bit. I plan on using all of the different size suction cups on Joy's pussy. My little sisters pussy is already loose with all of the fucking, it might as well be puffy as well.

We had a delicious breakfast and headed down to our favorite room in the house; our dungeon.

Joy's point of view.

This is going to be so great. I've been dreaming of having bigger tites ever since the first time we saw the video. I hope they ache real good too.

"Hey Candy, why did you change your mind?" I asked.

"Well, I knew we couldn't get away with it before. I mean, what would mom and dad say if you suddenly had huge boobs. Plus I was able to get some of that plant extract we need to inject into your tits to make it permanent." Said Candy as she strapped me into the X rack.

Candy had six needles ready to go. After injecting three into the first boob I can feel a faint burn. By the time the suction cups were attached, the burn is getting stronger.

"Oh God yes, it feels awesome. Please fuck my pussy mistress? I needed it so much." I begged watching my little boobies fill the suction cups in front of me.

Candy rubs lube on her hand right in front of me, letting me know a fist fucking is coming.

She moves her fist slowly in and out of my pussy, it feels like she is teasing me.

"Come on Candy, faster, harder." I begged.

"No, first we have to switch those cups. Why don't we try a nice C cup." Said Candy pulling the little B suction cups off my chest. I was staring at my new B cup breasts. They were red and puffy and the nipples were big. Right now they were so sensitive. Candy grabbed one and squeezed it gently; it hurt so good.

When the C cups had all of the air vacuumed out my tits hurt even worse. Candy went to work on my pussy with her fist again. With the ache in my chest, the pussy pounding didn't take long to bring me off.

After the three day weekend I am a little worried about sending Joy back to school. We went a little crazy and used all of the different size suction cups. Joy now has a D cup breasts and a much fatter pussy.

Her fattened pussy lips are easy enough to hide, but what are we going to do about her much bigger breasts. When she left school on Friday she had A cup breasts. Everyone will think she had a boob job when they see her massive chest.

I suggested we strapped her breasts down as best we could. Because they still ached from pumping and hurt a little bit, Joy was all for it.

When she dressed in a loose sweatshirt and baggy pants you couldn't tell she was actually a buxom slut.

I sat in class worried I would be called to the office and asked a bunch of embarrassing questions about my sisters bound breasts, but nothing bad happened and we made it through the day.

We only had a month until the summer break, if we can make it until then we'd be okay.

As soon as we got home from school Joy dressed in the smallest short shorts that she owned. Her much larger pussy made a huge camel toe that she loved showing off. She took a small tank top she grew out of a couple years ago and wrote SLUT across the front. Her new pencil eraser nipples were clearly visible.

She wanted to go slutting around at the bookstore, so I called Marty and set it up, not telling him about Joy's surprise.

Marty is usually not into Joy's skinny body, he sees her more as a tool to make money. He seems to enjoy her new boobs very much though.

The three of us are standing at the back door of Marty's perverted porno empire and Marty is squeezing Joy's new breasts.

"Oh yeah, how do you like them Marty? Oh yeah, that feels so good." Joy was able to say in between moans of frustrating pleasure.

Marty looked right at me and said. "How did you do this?" He knows I'm the one in charge of this slut.

"That's our little secret Marty, now let's go see that this little slut is well used." I said pushing Joy in the store, Marty still holding on to one of her breasts.

"I've got a little surprise for you two as well." Marty said intriguing me a little. "Oh my God did you do something to her pussy as well?" Marty said losing his train of thought in the cleft of my little sisters fattened pussy.

Marty was really digging his fingers into her pussy through her shorts as we walked toward the front of the store. Just before we got to the curtain that separates the lighted front and the dark back of the store Marty stops us.

"Wait, the store is still open, and even though she does look older than 13 with her new boobs. I don't want to take any chances." Marty said as he grabbed one of Joy's nipples and pulled her toward our favorite glory hole. "Besides, I want to show you that surprise I was telling you about."

I was more intrigued than ever. I had a feeling I knew what it was though. One of the many conversations Marty and I had was how Joy enjoyed being tied and helpless. Marty thought he could attach a few eyebolts to the glory hole wall and we could tie Joy to it.

It was even better than I hoped. A much larger padded hole was created between the two booths. It was big enough for Joy's ass to go through to the other side. It had a padded 2x4 running through both sides with the 2 inch side up. 5 inches of the 2x4 went into the other side for her pelvis bone to lie on. The 2x4 was angled sharply towards the wall, probably so the perverts nut sack wouldn't smash into the 2x4 while pounding the slut. With eyebolts now installed all over the wall her calves and ankles can be strapped tightly against the wall. This way she could not smash her clitoris into the 2x4. The teasing should drive her crazy. There were plenty of eyebolts for me to tie her hands as well.

As I was tying her up Marty said he would go up front and give me 10 minutes Before sending guys back. Plenty of time I thought. I decided to leave Joy's hands free. I did tie a small rope in a figure 8 motion around her new breasts and then attach it to the back wall.

Before the perverts came back to use the free fuck hole, I wanted to have a look and get a few pictures. Her ass looks so nice sticking through the hole in the wall. The hole was tight enough that Joy shouldn't be able to reach her clit. I left her shorts on only because I wanted them ripped from her body. I can't wait to see what her two peach halves of a pussy look like after they've been used for a few hours.

She was all smiles until I forced a ball gag in her mouth. I think she realized there would be no screaming out for some stranger to smack her ass, or pinch her clit.

We heard the squeak of the door to the booth next to us. We both knew the action would start soon.

"Wow, check this out." One guy said to another. "I can't wait to fuck that skinny ass." Said the stranger closing the door to lock everyone else out.

Joy and I could hear everyone talking about the new set up in the booth. Marty must have spread the word, there seemed to be a large group outside the booths. One of the guys who peaked in before the door was shut mentioned Joy's shorts. There were a few chuckles and another guy said "she's going to lose those."

I could see Joy reacting to something going on behind that wall. Just then we heard her shorts ripping.

"Wait till you see the pussy on this bitch." The guy in the booth yelled through the door to the perverts lined up outside.

It was obvious when the fucking began, the wall Joy was attached to started shaking. The ropes were holding her securely, she moved in unison with the wall.

She moaned, but I could tell she was being teased more than pleased. Just when she grabbed her nipple the guy blew his load.

She tried reaching for the clasp on the ball gag. I grabbed her hands and wouldn't let her. I knew she wanted to beg for some kind of torture. I was getting off on the teasing.

The door opened with the squeak and the next pervert entered.

"Man, you are right about the bitches cunt, it's a fat one. Said a guy I assumed to be black.

Joy began jerking around a little and looking back at the wall. The new fuck stick must have been playing with her fattened pussy.

The new cock was finally buried in Joy's sperm hole. With her loud moan it must have been a big one. The wall began moving again with another hard pounding.

Joy tried twisting her nipples again but I stopped her. It was fun holding her hands away from her body, watching her being teased by the fucking.

After a few cocks had their way with the faceless ass, I decided to give Joy the orgasm she craved. I called Marty on my cell phone and asked him to change the movie that was playing in the booth.

Soon Joy and I could hear the screams coming from a hard-core BDSM video. I wanted to try subliminal suggestion. Up until this point the guys weren't that rough with the faceless ass sticking through the wall. They just fucked one of the sperm filled holes in front of them and left.

I could hear a slap or two on Joy's ass every once in a while. This wasn't enough for me; or Joy.

"Come on fucker, is that all you got. You can smack me harder than that can't you." I egged the guy on through the wall, pretending I was the voice of the fuckable ass.

Joy's eyes finally lit up from the pleasure she gets from pain. She finally has the mind blowing orgasm she wanted all night.

After a few hours of nonstop pounding of her fuck holes Joy is tired. I tie her ponytail to the back of the wall so she doesn't have to hold her head up anymore. She has pinched and twisted her new boobs into a black and blue mess. I untie the ball gag. She exercises her jaw for a second and begs me for one more orgasm.

When there are no more cocks to use my sisters fuck holes, I called Marty to unlock the door on our side. I slowly walked around and opened the door to the other booth, I am excited by what I see.

Joy has man juice oozing from both of her loosened holes. There is a huge puddle on the floor and there is still more smeared all over her ass. Her ass is red from all the spanking; but not too bad.

It's a shame the SLUT branding can't be seen in this position. Oh well, I guess I'll have to give her another branding on her ass cheeks, probably something like COCKHOLE.

I know what Joy needs, a good fist fucking. First I reach between her fattened pussy lips and grabbed hold of her clitoris, then my hand easily slips into her loose cunt.

I don't mess around, I throw my hand into her pussy with blinding speed. Pulling completely out and punching back in; which I know Joy loves. When I feel her about to cum, I pinch her clitoris as hard as I can.

"Oh God yes, do it, do it harder please, oh yes, oh yes, please!" Yelled Joy, probably glad she is no longer gagged.

After she's untied, Marty gives her a tank top wife beater T-shirt just long enough to cover her fat pussy and red ass. We head out the door to the waiting taxicab. Joy's loose fuck holes dripping thick man juice the whole way. The glory hole is going to be a lot of fun in the future.

I think after I give her breasts another session with the biggest suction cups we have, she'll have those double D's I want to see so much.

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Until next time, you perverts have fun with this story.