Im's Sister the Slut

My girlfriend Kim and I have been going out for about 5 months. She is 23, about 5'4", with auburn wavy hair and bright green eyes. Her skin is a little pale, and she has a hint of freckles on her face and shoulders. Kim has a thin build, with perky B cups and a tight apple ass. The first time I saw her walk away from me in tight little panties, slightly sucked up between her hard cheeks, I was hooked. I am three years older, 6' even, muscular but not huge. Kim likes when I have a beard, so I keep a trimmed one that matches my short brown hair.

Kim's little sister Katie has fallen on hard times. Frankly, she's a bitch. I don't often use that term, but she really is. Drugs, skipping school, sexting, all before she even came close to graduating high school. She got kicked out when she tried to seduce a teacher for an A. Once Katie hit 18, her parents kicked her out, and now she is living on Kim's couch. Now she is causing Kim stress. Now she is causing me not to get laid.

"Come on, Kim, let me relax you with a nice shoulder rub... and then I'll lick you until you cum." Just a head shake no. I was trying to kill two birds with one stone, but I missed. Kim loves when I talk dirty. Maybe I'll try that.

"How about we put on that porn where the Asian chick takes on a couple? The one where her face is covered in pussy juice and it drips off her chin?" Kim is in a phase lately where her fantasy is to have a girl on her face while I fuck her. When I bring it up during sex, she licks her lips in anticipation. But not now.

"She's just sitting around. She promised to be looking for a job. I feel like her parent, and I'm sick on not being able to relax on the couch after work. She doesn't even make her 'bed' anymore." It's true. Katie sleeps on the couch, and has been getting sloppier by the day. She started out so clean and neat, picking up after herself. Two weeks later and she leaves her clothes all over the place.

She also dresses more scantily by the day. It's summer in Las Vegas, but the apartment is air conditioned. Still, Katie is starting to hang out in panties and a long t-shirt. Kim almost lost it when Katie ditched the t-shirt for a tank top. I guess having your boyfriend around your little sister while she's exposing her tight little ass in cute panties was too much. That, or the low cut tank top that revealed her D cups. I hope Kim is not jealous.

"You want me to talk with her? She sort of listens to me. She's just ignoring you at this point."

"Sure," Kim replied, "give her a stern talking to I guess. But not now, let's go to sleep. Tomorrow."

In 10 minutes, Kim was out. I decide to go to the kitchen for a drink. Water, maybe. Maybe I'll have a beer and watch some TV. Fuck, Katie's on the couch. Man, she really ruins everything. As I head to the kitchen, I hear some movement on the couch. I hope Katie is not bringing guys over to fuck. That's the last thing we need.

As I walked past the backside of the couch, I glance over. Katie is sprawled, her legs askew with one up and one extended. The blanket is barely up to her mid things. I see one hand on her inner thigh, right up where the edge of her panties barely covers her lips. I could swear her fingers glistened in the moonlight, but it's probably wishful thinking. As I pull my eyes away, feeling guilty from staring so long, I take a glance at her big, firm tits. Hard nipples poke through the thin cotton of her t-shirt. I feel guilty, but not from checking out such a nice rack. I'm a man, after all.

I hesitate coming back out from the kitchen. I definitely hear something now. A slight moan. A wet slurping. "You little slut" I think to myself. She had to know I went by. I drink my glass of water, thinking frantically. I want to take a peek, but I certainly don't want to get caught. Kim is a dynamite girl, and she's a sexual savant to boot. Why screw that up to catch a hot 18 year old fingering herself on the couch?

Still, I wait several minutes before heading out. As I stand there, I get the familiar scent of wet pussy wafting through the air. Wow, that's intoxicating. Similar to her sister, but just different enough to notice. Kim tastes divine, and I love when she cums on my face and drips as I suck her pink lips. I can imagine Katie tastes wonderful, and from the sound of it she is sopping wet.

As I come back into the living room, I make a slight cough as a warning. Katie is not moving when I look at her, but her panties are slightly askew and I catch a glimpse of the edge of her lips. She is wet, soaking her panties and making her fingers glisten. I take in a big smell as I stare, and as I do I hear her moan. A soft moan, but definitely a moan. I sniff again, and she moans again, this time her lips slightly parting in desire. Damn, Katie is such a dirty girl.

As I walk away, I hear the distinct sound of Katie sucking her fingers. I know the sound so well because Kim loves it when I make her taste her own sweet pussy juice off my fingers. I love when Kim does it, and my cock has a bit of pre-cum at hearing Katie do it. One last moan before I head into the bedroom.

Kim is asleep, but Katie's little games have left me almost bursting. Kim wakes up to me licking her pretty little pink pussy, lips spread wide so I can get to her little nub. She wakes up horny, and as soon as she's up I push her down and enter her harshly. I smack her ass loudly, and she yelps in pain and surprise. Kim loves to be handled firmly, with a little choking and slapping and hair pulling. I don't hold back when I fuck her, slamming into her as she tries desperately to push her ass up in the air and fuck me back. I usually last a long time, but I'm so worked up by my sexual frustration and Katie's show that I know I won't last long.

"I'm going to cum down your throat, Kim!" I yell at her.

"Oh yeah, fuck my face and cum in my mouth!" she exclaims, excited by the sudden dirty talk. Man, any dirty talk makes her hornier.

"My cock will be covered with your pussy juice when I fuck your face. Lick it all off." I command.

"Mmmm yeah I love to taste my pussy juice, baby! Give me that cock!"

I pull out of her pink and bring my cock up to her face. She quickly licks all her juices off before taking it deep in her mouth. Within 30 seconds, I am ready to explode.

"Swallow my cum, baby! I'm going to cum.. I'm cumming!" I erupt in her mouth, my cock shooting blasts of my seed into her tiny little mouth. Kim's only recently started taking my loads in her mouth, and a little bit slips out of the corners of her mouth and she valiantly attempts to swallow it all.

"Oh yeah, that tastes so good, baby!" she cries once she's swallowed most of it down. "I love the taste of my juice and your cum together!" As she says this, we hear a bump in the hallway. "What was that? Was that Katie?" Kim asks.

"I don't know" I say, while secretly hoping that it is. "If it is, she now knows how slutty her sister is."

"Only for you, baby. Only for you. I'm going to check it out." Kim slides on her panties, and I fall asleep to the hypnotic view of her pantied ass swaying away.

I woke up early, and Kim was still asleep. I headed out to find Katie already up.

"Coffee?" she asks? I am a little surprised to see her holding a cup out for me. She looks adorable with short shorts, a tiny tank top, and knee-high socks.

"Sure, thanks. I'm surprised you know how to make it." As I take a sip, I run my eyes up and down her body, which is turned away to pour herself a cup. The socks are a nice touch, accenting her smooth legs and giving her a naughty schoolgirl look. As if I needed more reason to think about her after last night. Oh, Katie, you're killing me.

I sat down to catch a college football preview show. Katie sat on the couch as well, and as I looked over I noticed the same pink and gray striped panties she had on last night jammed in the couch cushions, just a hint of fabric peeking out. Fuck, I would love to get those. No, no, no. I just fucked Kim like she was a whore last night, because she is my whore and she's amazing. I can't be thinking about the cute little panties that her little sister soaked last night. Still, I wonder if she listened to us fuck last night.

Throughout the morning, Katie is helpful. She cleans, she cooks, and she is polite. What's going on? For one thing, I swear she's teasing me. Sure, she's cleaning, but must she bend over so far, exposing just a bit of underwear through the leg of her tiny shorts? Or does she have to wipe her hands off on her shirt by rubbing her palms over her tits? Or drop some eggs down her shirt and clumsily retrieve them by almost popping her boobs out of her top?

Kim comes out about an hour after I first did, and she immediately notices how clean the living room and kitchen are. "Cleaning are we? After you had no energy to finish me off last night?" I can't believe how open she's being about our sex life in front of her little sis.

"No, it wasn't me! Katie did all of this; she's been a real superstar this morning."

"Well, she must think a lot of you for her to listen to you. Does every girl just do what you tell them to or is it just girls in my family?" Kim asks.

"So, Kim, you always do what he tells you? Anything at all?" Katie asks with a raised eyebrow.

"I knew you were listening last night!" Kim exclaims.

"What are you talking about? I was asleep last night. Not like I haven't heard you two going at it before, but I haven't for a while. Besides, no one asked me to clean. I decided to help out. And I'm fully clothed!"

"Yeah, barely you slut!" Kim teased.

"Now, ladies, I'm sure you're both as slutty as you want to be, but I'm trying to watch a show." I say this hoping they will continue.

"Whatever, we're going shopping. Come on, Katie, let's see if we can find something for me that will keep this guy awake long enough to satisfy me." Ouch. Fall asleep once, and a thousand pussy eatings disappear, apparently.

After the girls are gone, I lay out on the couch and smell something familiar, something delicious. I see the cute little panties that Katie left stuffed in the couch and just stare. My cock starts to swell. I try to look away, but I'm only human. I pull them out and I am almost overwhelmed by lust as I smell the sweet young pussy that soaked them. After a few minutes, I put them back and try to forget about it.

Later that night, I again go to the kitchen for a glass of water. This time, I smell pussy as soon as I get to the living room. I see Katie laying on her stomach, a hand definitely in her panties; I can see a little movement at the crotch. Once again I am in the kitchen for a few minutes listening. This time, Katie moans a bit more. I hear her fingers slide in and out almost violently, fucking her little hole and sloshing around her juices. Every minute or so I hear her sucking her fingers and I want to run out and fuck her. But I resist. After a few minutes, I walk out. This time Katie is on her stomach, panties pushed to the side, fingers in her pink slit, and her ass just begging to be smacked.

Once again, I wake up Kim with a tongue bath and conclude by shooting a load in her mouth. This time, I talk dirtier. "You're such a little slut!" "You want your pussy juice in your mouth, don't' you?" "Swallow my load, cum slut!" Kim cums as I fuck her, and I cum in her mouth. I swear I hear a noise in the hallway, but this time Kim is too worn out to hear it. But I know.

The next night I again sneak out for a drink of water. This time, Katie has her shirt pushed up, her right tit out and her fingers pinching her erect nipple. Her left hand is in her panties, and she appears to be rubbing her clit in circles. Before I can head to the kitchen, she pulls a wet finger out and rubs it around her nipple. Then Katie takes her right tit into her mouth and moans. As she does so, she opens her eyes and sees me. She does not miss a beat, but locks her eyes with mine as she pulls her panties to the side, exposing her dripping pink slit.

"Mmmmmm" she moans as her finger goes back to her pussy. She is no longer looking at me, but has her eyes screwed shut. I stand, watching. "I'm such a little slut... I'm a cum slut!" she moans as puts two fingers in her snatch. Soon, her shirt is up and both tits are exposed. She spends some time playing strictly with her tits, her body contorting with pleasure. As she looks at me again, she glances down to my crotch, which is hidden behind the couch. I step around, my dick clearly outlined in my boxer briefs and a wet spot where my pre-cum has oozed out. As she stares at my cock, she reaches down to spread open her pink pussy lips, and I get a beautiful view at her wet hole. Damn, she looks remarkably similar to Kim

Kim! I think to myself. I shouldn't be staring at Kim's 18 year old little sister masturbating. I take one more look at Katie, her pussy spread open and thrust up off the couch, and head back to the bedroom. This time, I awaken Kim by rubbing my cock on her face, putting pre-cum on her lips. We end up in a 69, with my cock erupting in her mouth as I clamp down on her clit. She cums as she swallows, and I drink up her dripping juices.

"I think Katie needs to get fucked." Kim says.

"What?"

"I found her panties in the couch. They were... let's just say she was definitely having a good time with them. Didn't you notice it's smelled like pussy out there for a couple of days?"

"Where did you find them?" I ask.

"In the chair. Don't tell me you didn't see the green panties, you horn dog!"

Green panties in the chair? I must have missed them. "No, I did not! I always notice yours when they're snugged up to your pussy, but otherwise I haven't noticed any panties."

"Well, if she's behaving so well after getting off every night, I need to make sure she doesn't get bored. She needs some dick!"

"Ha! I thought it was my commands that made her behave?" I teased.

"Oh, maybe the commands made her horny. After all, you know how being bossy to me makes me gush!" In that moment, I was convinced that if I told Kim and her sister to fuck me, I would have them both dripping and ready to go. I love girls that get off on taking orders!

The next night, I again went for a glass of water. This time, Katie was just teasing her soft teenage body. Her fingers traced over her thighs. She traced around her nipples through her shirt. She made eye contact with me early, and glanced down. Again, I stepped around the couch and she stared at my cock, held back by my boxer briefs, as she pulled her shirt up and began playing with her tits. She fondled them. She kneaded them. Katie even licked them before really going to town on her nipples.

"Sit down, please?" She asked hesitantly. I wanted to say no, but just the she pushed her hand into the top of her white and pink panties. They had little bows on them, and I could see her labia through the thin fabric. I saw down, half reluctantly and half excitedly. Her hand manipulated her pussy inside her panties and I sat and watched, mesmerized. Her eyes were barely visible over her heaving chest, and she would occasionally squeeze and play with her right boob.

"Please let me see your cock, sir!" Katie said almost breathlessly. "Please, sir, I want to see it. I will be a good girl if you let me look at your throbbing cock." With that, I froze. On the one hand, Kim would probably be pissed if I showed my dick to her little sister, barely 18. On the other hand, it's just a look.

Soon, my boxer briefs were down my thighs, my thick cock throbbing with each heartbeat. Katie sat up on her knees and I instinctively pulled back. "I just want to see it," she said, "honestly. I just want a good look at what you're giving Kim every night."

"Be a good little girl," I commanded, "and you can take a close look." She practically jumped up onto her knees, her head bent forward.

"I'll be a good little girl for you," she moaned, "just let me look." She was within inches of my cock, her lips pursed in concentration. I noticed one of her hands between her legs, although between her D cups and her shirt I could not see anything. Her breath hit my balls, warm and moist. I felt it on my dick, and a little pre-cum oozed out.

"Ooooh!" she exclaimed, "that looks tasty." Her head got closer, but when she looked up I shook my head no. "But I want a taste!" she said. I again shook my head no. "I need to taste something!" she almost moaned.

I often compare sexual situations to a roller coaster. There is great anticipation on the way up, and at some point you hit a tipping point. Going over the top, there is no going back, and the ride will be exhilarating and bring you through twists and turns.

Just then, Katie brought me to the point of no return. As if in slow motion, she slowly brought her right hand up from between her thighs. I could see her sticky juice like a spider's web between her first two fingers. She first rubbed her juices into her puffy lips, her tongue snaking out and taking a taste. "Mmmmm," went the low, guttural moan from her throat. Her tongue then shot out and licked her first finger, and I could see her juices coat her tongue.

"Oh fuck!" I said out loud, unable to help myself as my girlfriend's little slutty sister tasted her own pussy juice. Katie took that as a sign, and she smeared the pussy juice on her second finger on my balls. Before I could even protest, her tongue was licking it up. She snaked her tongue up my shaft and back down, again taking in my balls before moving back around my cock. As she reached the tip, her tongue scooped up my pre-cum and she savored it in her mouth. Never using her lips, just her tongue, she proceeded to lick my cock up and down.

My eyes were closed, my head tilted back, and I enjoyed the sensation of Katie's eager tongue. I heard another moan, but it wasn't coming from Katie. Alarmed, I looked up to see Kim, only wearing a blue thong, standing not ten feet away. She was staring at her little 18 year old sister lick her boyfriend's cock. For a moment, I braced for the worst.

Kim wasn't even looking at me, though, she was transfixed on Katie. Her eyes wandered from Katie's head to her ass, sticking up off the couch, her pink and white panties taught on her firm ass. Just as Kim started to move slowly around the couch, Katie took my cock in her mouth, her lips touching me for the first time.

Kim was staring at Katie's ass. She sunk to her knees, her face level with Katie's surely dripping pussy, covered in only flimsy material. From what I had seen earlier, I knew Kim could see Katie's labia through the material as it hugged her folds. I watched as Kim, almost in a trance, leaned in and inhaled Katie's scent. She shuddered, her hands going to her B cups and tugging on them roughly. She looked at me for just a moment, her eyes almost begging for permission.

"Go for it," I say softly, "go for it you dirty slut." I was talking to Kim, but Katie moaned as if I was calling her a slut. What a filthy family. If only Katie knew what was to come. Kim pressed her face forward, and her mouth gave Katie's pussy a delicate kiss through the cotton fabric. Soon, Kim was making out with her sister's slit, her tongue pushing against the fabric and her lips teasing the exposed outer edges of her lips.

"Mmmm, yeah," I heard Katie mumble with my dick in her mouth. Kim reached up, and in the slowest undressing I've ever seen, she pulled those pretty little panties off her sister's ass and down her legs. Kim pulled the panties up to her face, taking in the scent, and then tossed them at my head. I caught them, pulling the soaked garment to my mouth and getting just a little taste. Divine. Almost like her sister, but maybe a bit thicker and sweeter.

I saw Kim reach out to spread her sister open before sticking her face in. Katie increased her pace, moaning as she got eaten out, the moans reverberating on my cock. I heard Kim's slurping sounds, as if she was trying to suck her sister dry all at once. I looked down as Kim pulled her face back, her bee stung lips swollen with pleasure and covered in her sister's juices. That did it.