The next couple of weeks were pretty much the same routine, every two or three nights I would sneak into her room and masturbate staring at my little ...irl while she slept. Sometimes I would lightly caress her breasts or her panty covered pussy while I jerked my cock, other times I was content just to watch her sleep while I rubbed one out. I was going out of my mind with lust for her and was seriously considering professional help, or at least trying to go out and get laid. It was after another. Her nipples were clearly hard as she walked over to him. She stood up on her toes and kissed him, then stepped back. She reached out a hand to his arm for balance and removed her sandals. He tossed them to the gazebo, noticing that one went over the railing in the back. He'd have to get it back later."Ready!" she exclaimed. He reached up and twisted the nozzle letting the hot water cascade down upon her. "It's really hot!" she said in a giggle. "I wasn't expecting that." Wet yourself down. The feeling of her asshole tightly gripping my cock was incredible. And the fact that I was fucking my girlfriend’s little sister in the ass was unbelievable. “Fuck, fuck, fuck, fuck, FUCK!” Madison cried out. “I’m gonna cum Brian, oh my GOD!”Madison’s eyes rolled into the back of her head and her toes curled as her orgasm hit. I felt her ass begin to pulse and spasm around my cock, and that immediately pushed me over the edge.“Fuck, I’m cumming too,” I grunted. I grabbed her hips and sunk. And I've gotten off with guys who were smaller, too. One guy, anyway."Louise's lecture wasn't over. "Listen, Cathy, a big one is nice -- damned nice! But it's not the end of the world. I'll tell you right now, you're better off with a guy like Tad who's nuts about you, then some big-dick, big-ego guy who thinks all he has to do is stick it in and stir and you'll go all ga-ga!" Tad's wonderful, it's true. He's all I need. Still, when I saw Don's erection that night, well, jeez, I had to think,.