This story includes messy sex with my sister in law, and cuckolding and mild voluntary humiliation of her husband. If that's not your thing, there are other stories for you to enjoy, so I'd skip this one.
I had forgotten how cold the winters are in Cincinnati and arrived at my brother's house in mid-January already chilled just from the trip. Karin was, as usual, happy to see me, and gave me "the look" shortly after I entered their kitchen. I played the straight man, but all I could think about was what panties my brother's wife was wearing, and how long it would take to get them down to her ankles.
George was seated at the counter, so I had no luck getting alone time with her, and it just built the anticipation. I had gone a couple of weeks without release, holding my lust for my sweet sister in law.
All night, it seems like every time I reached for a quick feel, or tried to get close enough to steal a kiss, my brother or one of the kids showed up. It was frustrating, but kind of exciting as well. But by the end of dinner, I was ready to have my cock inside her in a big way. We had a couple of drinks, and I made George's extra strong, hoping to wear him out, but we all just ended up getting pretty drunk.
When George finally headed for bed, I grabbed Karin from behind, holding her against me by her breasts, my erection buried between her cheeks, smelling her hair. She slowly ground her firm cheeks against me, but then my niece, Holly, came jogging down the stairs and almost caught us. Finally, frustrated and hard, I headed to the guest room, hoping to get to sleep before the urge got me to waste an orgasm alone.
A few minutes later, I heard Holly and Karin come up the stairs, and Holly say good night. Her door shut, and my mind was flooded with visions of my niece undressing on the other side of my wall; wriggling out of her shorts, peeling her panties off... More and more Holly was starring in my fantasies.
A few minutes later, Karin tentatively opened my door. I feigned sleep, messing with her, but she came over to the bed and leaned over to sneak a kiss. Smelling the rum on her breath, feeling her hair fall on me, I grasped her behind her head and whispered that I had something for her. She took a hold of my cock, "I can see that you do, and I have just the place to put it."
But now we heard a door open, and she jumped up from the bed. Grabbing a blanket, she turned to see George at the my door. "What are you doing, Karin?" he asked.
"Just getting a blanket for Mikey, she replied. I forgot to give him an extra, and you know how cold this room gets."
He stumbled back to their room, and we heard him in the bathroom. Karin gave me a quick kiss, and told me, "tomorrow I'll fuck you if I have to do it at the dinner table." She headed towards the door, then turned, "now you be a good boy, no masturbating, or mommy will be mad. I want a big pussy full of you tomorrow!"
I laughed and waved my cock at her as she crossed the hall to their bedroom.
But a couple of hours later I woke and was astounded at how cold the room was, had to be below freezing. I stumbled over to the closet, looking for another blanket, but was unable to find one. Out to the hall, I looked in another closet. I heard the toilet flush, and George came out of his bathroom just then. "What's up bro?"
I explained the situation, and Karin came to the door as well. They checked out the guest room and were shocked at the temperature. "I don't think a blanket's going to do it," George admitted. Maybe you should sleep in Holly's bed, and she can sleep with us."
I was thinking I'd rather sleep in Holly's bed, and she could sleep with me, and a glance at Karin showed me that she knew exactly what I was thinking. She smiled and shook her head.
"George, you know Holly will keep us awake all night," Karin said. I smiled at her, the meaning clear, "or she could keep her uncle awake instead."
"Yeah, I guess. Maybe he could sleep on the couch."
"We have a huge king-sized bed," she said, sounding exasperated. Turning to me, "just come sleep with us for god's sake."
I saw George doing the math. She told him, "don't worry, I'll sleep between you two, you don't have to worry about him throwing a leg over you and making you feel gay." Turning to me, "You know how paranoid he is about the gay thing."
"Fine," he grumbled, and headed back to the warmth of his bed. I looked at Karin with a questioning look, she smiled and pulled out the waistband of her pajamas, flashing her panties at me for a second. "Careful now," she told me. "Don't know if you can last a whole night next to this." Bringing her lips to my ear, she murmured, "he leaves early, I'm going to wake you up with my tongue tomorrow."
So we crawled into the bed, and George was already asleep on the far side of the mattress. I followed Karin under the covers and gave her ass a quick squeeze. She gave me a warning look, and rolled over on her side, pulling the blankets up high. "Goodnight Mikey."
I lay down, and pulled the blankets close, feeling the warmth where she must have been sleeping. I inhaled deeply, getting a little of her scent from the sheets. "Mmm." And now I really started to harden.
Hearing me, Karin turned and smiled at me, then fumbled around a little under the covers and presented a finger, wet and slick. I moved closer and she held it under my nose. Her eyebrows arched, expecting a response, and when I smelled that musky pussy, she got it. I grabbed her finger and sucked it into my mouth, then tongued it to show her what I had for her.
Again, she turned away, and I fell back on the pillow. It wasn't long before George was snoring, and after a few minutes, Karin was breathing slowly as well. But I was having no luck falling asleep, I was hard as a rock, and too turned on.
Twenty minutes went by, and finally I lost common sense and control. I slowly inched towards the middle of the bed, where my lover lay inches from her husband. I reached out and stroked her thigh, the heat coming off it almost as tempting as the memory of her pussy. I became bolder and bolder, now caressing her ass, then pulled my body within touching distance. She didn't stir until I molded myself to her back and reached around to find her heavy breasts. I buried my nose in her hair, loving the smell of her. Blood surged into my cock, and it poked her leg. I maneuvered it up between her cheeks and found the perfect fit.
Slowly she came awake, and suddenly turned her head in alarm. The movement woke her husband at the same time, and he groggily asked what was going on. "Mikey is touching me in his sleep," she whispered.
