I helped my hot older sister move a friend's kid out of state, far enough that the drive itself was exhausting, let alone the day of moving stuff. We got a hotel room with the other two people, who were a couple, and, when deciding bed arrangements, no surprise, I slept with hot sister. She joked "Wouldn't be the first time for us, guys (to the other couple, who shrugged it off, but I could tell the woman was a bit suspicious). We chatted for a bit, had some drinks, and hot sister went to the bathroom to change for bed. She came out in an old, black tank top, cut to about half and showing off her tanned, oval innie navel, and her bikini bottoms to sleep in. The other couple were a bit..Surprised, and the guy, to be honest, eyed her up and down until the woman caught him. My sexy as hell, nearly-naked sister got into bed with me and it was lights out. I'd already been under the covers, naked from the waist down, for comfort and knowing hot sister would use her hands and long nails on me when the opportunity presented itself.

When my nearly-naked sister got in and cozied up to me, getting comfortable and inserting her right hand and long nails into my shirt, she started to caress and lightly dig in, as I was also feeling her soft, warm body and already raising the tank top north for better access to her marvelous 36C's. That was done in silence, and waiting for the other two to fall asleep. Aroused by her long-nailed action, I softly told her "Go lower", and she did, with a little grin in the bit of light coming from the window. She starts working my cock like a pro, feeling, stroking, digging her nails in, and basically sending me into a rock-hard crazy desire to have her.

We traded a few deep liplocks and oral examinations, still mindful of the people only a few feet away. I mounted her and started fucking her, then heard breathing and the occasional snoring from the other bed. By that point, however, I admit.. I didn't care. Hot sister and I were too fired up and into this, and, if anything, would go out of our way to make sure they heard or saw us, older sister and younger brother fucking each other five feet away from their own bed. With that, I flipped the covers down and really had at her mound, as her hands grasped my shoulders and arms, digging into my skin as if leaving her mark on me. We tried exhaling or, in her case, shrieking into the pillows, but I doubt that did any good. We were having an active, sweaty, passionate fuck session, after a long day, period. And nobody was going to keep me from having at my favorite, sexy woman. She knew it, too, knew the power she had, and that no matter who I was with, woman-wise, they'd never be her and I'd always come back to her for the best sex.

When we finished and rolled over to sleep, she whispered, with a little laugh "Think they know?". I said no, I didn't. The next day, things were busy and there wasn't much time to rehash the hotel room with the other couple, but...Sly, sexy sister wanted to know anyway. We're having a late lunch (Ruby Tuesdays, I think), and got to talking about the hotel, check-out time, etc. Then, with her hidden hand on my leg under the table as I felt her long nails, hot sister asked how they slept, was the bed comfy, and if any "noises woke you guys up". They said no, bed was fine, then our food came. On our way out after paying, the guy nudged me as the women were a few steps ahead in the parking lot.

"So, we're not going to ask how you liked fucking her last night, are we?" he said. "She was asleep, but, I heard the whole thing, man...You made her sigh pretty high-pitched..Good for you" he joked. And not a word was said about it the rest of the day. Of the four of us in that hotel room, 3 were well aware that hot-bodied sister and her worshipping, fuck partner brother had wild sex the night before. One had no idea, and as far as I know, still doesn't. I like it that way..More nasty fun.