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Undercover Slut My Sister In Law

Undercover slut – my sister-in-law!

I was only 18, newly married to my 18 year old wife due to her untimely pregnancy. I worked on a cattle ranch, long days, short nights, except for the winter. Her sister, a 16 year old, already had a daughter due to her Mom’s live-in boyfriend taking advantage. Most of the time, I couldn’t understand how the old bald bastard was attracted to her at all. She was young, but skinny as a rail, no boobs, no ass, dressed in baggy levi’s and sweatshirts. Then her face – thin and horsey looking, with a large nose, and a really good bloom of acne. Her life was rough – Mom’s boyfriend took footbail, and was out of the picture, but living with her Mom and her baby after quitting school, plus no job or money – she was always sulky and pouting, and who could blame her?

Winter of 1997 came, and I didn’t have to go gather cows all day or haul hay. I drove out and fed horses for a couple of hours, then back home by the fire, just lying around while it snowed outside. My wife worked all day as a waitress, and my kid stayed with Grandma. Since my wife’s interest in sex had become severely curtailed by her childbirth experience, her weight gain, and sudden interest in the Lord, I was hurting for pussy. My days were spent rereading a stupid old sex novel or trying to glimpse a boob on a scrambled Showtime channel I couldn’t afford – just so I could jerk off.

It was one of those days; snowing, noontime; I had already jerked off, and eaten two frozen burritos – in other words, a classic white trash perfect day! A knock at the door, and I let a shivering Mary in, my sister-in-law. She said that her Mom was driving her crazy, the TV was broken, and that she needed to get away – hoped I didn’t mind if she watched TV with me. I minded – “General Hospital” was her thing, and I knew that is what she had in mind, but, what the hell, cartoons could wait, so I told her to sit and did she want some hot chocolate? She did, I made it, and she drank it on the couch. I sat in the recliner and secretly looked at her as she watched her soap with intensity. She was indeed homely – but, with her jacket and sweatshirt off, I could small bumps of boobs – enough for a fool like me to think about.

Sex, of course, was about the only thing ever on my mind then, so I placed Mary in my mental catalog to fantasize about. Her sister had told me that she was “gross” because she was always “touching herself” when she was young, shaking their bed, and talked about sex all the time using “gross” terms like “fuck” and “suck”, even when she was only 13. (Yes, my wife was a bitch on wheels.) Of course, this only fueled my fire, and I quickly decided she was very “doable”, ugly or not.

She caught me appraising her a couple of times, but gave me sour looks, so I thought, “oh well…” and waited til her show was over. When it ended, she asked me what the ranch was like, and what did I have to do out there in the snow? I told her about loading hay onto the truck, and driving around, stopping to kick off bales. I made sure I rubbed my muscles and neck to show what a studmuffin I was. She made more hot chocolate and set in on the coffee table, so I sat next to her to drink it. She began telling me about her Mom, and tough it was, and how the asshole that knocked her up should be dead, etc. I, being a brilliant 18-year-old idiot, felt that injecting sex into the conversation would lead to sex.

“So, how was it, I mean, being with Bob?” (I had never heard the real story. The word was that he had taken her with him on when of his trips as a truck driver, and knocked her up after getting her drunk.)

“It was OK, he was nice.”

“I thought he sorta forced himself on you or something. I mean, you know, in bed.”

“No, not really. We talked a lot, and once, when we stopped, I saw him going to the bathroom by the truck, and it got me curious.”

Holy crap! I thought – this was different. She had started something? He didn’t get her drunk?

“Well, and then we drank some beer, and you know, one thing led to another, sort of..”

“Wow!” I cleverly said, rubbing my neck to cover my horniness and shock at her candor.

She reached over and put her hand on my neck, and rubbed. “Is this the spot? You keep messing with it.” I said, again cleverly, “Yessss… that’s it”. As it was the spot and she was rubbing hard and it felt great! “Here, scoot up…” she said, pushing me forward, moving behind me to put both hands on my neck for a real massage. I moved to the edge of the couch, and then just slid down into a sitting position on the floor in front of her. She moved her leg, so she was behind me and straddling me, and really began to rub.

“Is that good?” she said. I could only groan. She laughed and said “I guess it is!” I enjoyed it very much to say the least, but was going crazy, with her knees close to my sides, and her hands on me. “Take your shirt off.”, she said. So I did, and she began moving her hands up and down my back, rubbing. After a short time, she said: ‘My turn”, and sat next to me on the floor. “Huh?” I said. “My turn now”, she said pointing for me to sit behind her. I stood, and while moving to get behind her, my obvious hard-on was only about 3 inches from her face. She stared. Of course, I figured it was my stupid imagination.

I sat behind her and rubbed her neck, moving her long stringy hair to the side. She groaned and leaned back into my hands as I kneaded her neck and then her back over her shirt. She leaned forward a bit as I worked down her back and groaned even harder. Then – I had a truly stupid only a 18 year horndog moment that seemed perfectly logical then - I quipped, just as she had: “take off your shirt.” She turned, looking shitty. Uh-oh! I’m dead! Over the line with a 16 year old that just happens to be my wife’s sister! I hurriedly started the “I’m joking” routine. But, instead, she pulled her top over her head, revealing a too-tight bra restricting tits that actually existed – not big, but not small either.

She turned, and I quickly began massaging her neck and back, and the good groaning sounds returned. I lifted her bra strap to rub underneath when I passed that spot, and she gasped a little. I did it again, pulling a little harder on the strap. She gasped again, and then said “Just unhook it, you can’t get under it, it’s too tight. My stupid Mom bought it.” I agreed that her Mom was stupid, and that it would indeed improve my performance, so I did. She clamped her arms down as the straps sprung forward, so her tits stayed covered. I rubbed. Now I scooted up, close to her back, trying to look over her shoulder for a look at those suddenly desirable boobs. I was rubbing her shoulders, when things happened; I sort of dug in a little hard on her right shoulder, which caused her arm to move out, which caused her bra to fall on that side, which caused me to quickly lunge forward in an effort to see the uncovered Nirvana, which… caused my cock to hit her in the spine. I froze. I could indeed see her tit, small, but excellent, and topped by a huge nipple. A very huge nipple, possibly a result of breast-feeding? This caused my dick, touching her through a layer of Sears Jockey shorts and Wranglers, to jump. She jumped. And pushed back, moving into my cock.

Then it was a blur. I pushed back, sort of dry humping her back. She turned a little, and I could now see both of her tits, and she was facing me on her knees. She leaned, I leaned, and we put our tongues in each other mouths. I grabbed her tits. She moaned and rubbed my cock with her hand. We both stood, kissing, as we fumbled with each other pants.

I got hers open first, and my foreplay consisted on pushing my hand down her pants, moving her panties aside, and rubbing her wet soppy slit. She stopped fumbling with my, and we were both on the couch as I rubbed her pussy, fingers now inside while she moaned. I kneeled in front of her and pulled her pants and panties off, revealing a furry, but fat cunt. She was soaked. I plunged my face into her. She pulled the back of my head and arched her back off the couch, fucking my mouth. I looked up to see one of her hands pulling her huge nipple viciously – “coning” her tit out from her chest. Suddenly, I was flooded. She was pissing! Or at least it seemed like it. It wasn’t like piss though – more white looking, and a little sticky feeling. I went for it, staying on her clit while she bucked. She was moaning and saying “I’m sorry, I’m sorry…” over and over.

As she became sensitive and pushed my head away, I looked at her, my face covered in white goo. She was embarrassed – I could see it. “I always do that when I cum, I’m sorry..” I said; “What? That was the best thing ever – keep doing it!”. “Really ?” “Oh yes, that was fucking great!”.

She just smiled, and I took my pants the rest of the way off, revealing my pudgy (short but really fat) and very hard cock. She grasped, jerking it towards her, pre-cum leaking all over her hand. She lay back, and rubbed the cum all over her tit, smiling up at me. “Fuck me” she said. I pulled her by her legs onto my cock, plunging to the hilt. I went again from zero to full speed – pounding her hard. She was groaning, but said “Don’t cum in me”. I just pounded harder. I was close. She groaned, cumming again – saying: “fuck me hard!” loudly. That was it. I quickly pulled out, ropes of cum spurting onto her stomach. She reached out and rubbed them on her tits. She pulled me towards her, and sucked me into her mouth, snuffling and groaning, just over the edge with sex.

More to follow.

End of Story