I am a straight teenager that has been taken advantage of... and I'm afraid I enjoyed it. I have friend that is a bi girl, I too am a girl but I AM NOT BI.. before this anyway. 'Lilly' told me the first time that she was bi when she spent the night at my house. We were lying in bed and she had always sleep-in just her panties because it was more 'comfortable.' I didn't have a problem with it at first. It started when she told me she had been with a girl before, a little like 'now' she asked me if I was willing to take my panties off, so she could show me what she learned. I told her I wasn’t like that, that I was straight, and she promised me I would be, it’s okay because we are best friends. I just shook my head and said that’s okay I'm sure someday my boyfriend and I will try it. She laughed it off. . In the middle of the night I woke up because I had started orgaseming. She had her hand down my panties and was rubbing me very, very hard. I was really freaked out and couldn't believe I hadn't woken up until now... but what really freaked me out was I was really enjoying it. My body was hot and wet. My nipples were so hard I could see them through my tee-shirt, and I longing for her touch. She smirked because she knew I had woken up because I had bucked it felt so good, I was even moaning… she knew I liked it and because of that she leaned in and whispered in my ear. 'If you want me to continue, you will have to beg me.' I couldn't even believe she had said that to me, but I was on the brink of my climax and I almost screamed for more... After I 'finished.' I felt so dirty, and still h****, I couldn’t stop the feeling. I tried to get up and walk it off but eventually I told her that it was good practice and I wanted to know more. She did so much to me that night my c*** burned and I had to wash my sheets the next morning.