(Sarah's Thoughts)

Then I had to turn over so she could do my back and I could tell that my buttcrack was hanging out so much and my bottoms didn't cover much of my ass anyway. I couldn't help smiling when my sister began rubbing the sunscreen into my butt. I really could tell she was putting on a show though, she kept letting her hands slip underneath even though I didn't need any protection under there.

All of my sister's fooling around made my bottoms fall into my buttcheeks. I felt a bit exposed so had her pick it out, I thought about just leaving it to tease the guys even more but it was a kind of uncomfortable.

I decided to flip back over and take a bit of a nap. Well, I tried to. That was when my sister got up and went over to the group of boys who were ogling me this whole time. What the hell! Next thing I know she and one of the boys are making their way back to me. I decided to just pretend to be asleep. I really didn't see anything but I could hear my sister getting rubbed down by him. I swear she's the biggest tease ever. He didn't seem to notice but I caught him staring at me a few times while he was straddling my sister. This guy better count himself lucky.