Whether she wanted to or not, her face started to show pleasure as I curled my finger, stimulating the walls of her butthole. Just like I did to her p...ssy, I slid more and more of my hand in until I was fisting her. "Please... Please stop... I feel... So full!" She groaned as my fist loosened her mostly-dry butt. I rapidly ripped my fist out of her and stuck in a long, veiny black dildo. I pumped the dildo in and out, balls deep then back out again. I continued until her anus was gaping wide. She looked up at us and asked, "Well Jennie, what are you waiting for?"I lay on my stomach and Jennie started to rub sunscreen on my backs and legs. Her hands felt wonderful as she rubbed the lotion into my skin. As she got close to my ass, I had an erection, but no one could see it.Jim rolled over and so did I. The sunscreen rubdown continued. I don't know about Jim and Lisa, but when Jennie touched my breasts and then went lower to my stomach, my erection pressed even harder against my. She figured she might be able to make it back to the room where her group was in time before everyone woke up thus eliminating any notion that she was ever gone. Katie slipped quietly out of the bed and picked up her heels and the skimpy clothes she wore last night at the lounge. She quietly proceeded out of the room and then dashed down the long hall and through the maze of stairs and corridors back to her room, praying that someone would not catch her completely naked covering herself only. I had stopped questioning these secret urges. I just decided that since it would never happen anyway I was free to indulge my fantasies any way I chose to. I knew I certainly didn't want to do anything one-on-one with a man, so I wasn't gay. I guessed it could be described as "bi-curiosity", and I didn't feel bad about it. Now here was Julie apparently seriously presenting me the opportunity to indulge at least the major part of the fantasy.I needed to sound her out about the parts she didn't.