At last I saw the light brown nipples. Was kissing for boobs madly and sucked her boobs. My heart was beating so fast that I couldn’t breathe. Then ... stopped and took a long breath and went forward.My penis was real hard so removed my shorts and t shirt also. That gave me great relief, after which I thought to put my dick on her mouth. I slowly opened her mouth and put my dick inside, it was my best experience in life time.Inserted my full dick inside her and was mouth fucking her. Seriously. I was really waiting for her to tell me this was all a huge, strange joke, but that other shoe never did fall. Beverly was totally serious and she wanted me to be her 15-year old daughter's first lover. I wanted to ask Beverly why she was offering me this opportunity to deflower her virgin daughter (actually her first of three daughters)."Tom, I want you to do this because I know if you don't, Amber's going to get her first fuck somewhere less ideal and I'm afraid she'll end up pregnant long. I mean, Angie and Stacy had barely dried themselves off and my bed would be seriously wet after this, but still..."It smells funny in here," Stacy said, wrinkling her nose as she curled up next to me."Kinda like..." Angie narrowed her eyes and she'd gotten on the other side of me." ... girl cum," Stacy finished for her sister."Boy cum too," Angie agreed. "I think." Uhhh..." I felt my stomach lurch with desperation. My bed definitely smelled like sex and the twins obviously knew what girl cum. They were both very good about making sure both sets of parents knew their plans. Ben always wrote his schedule on the white board by our phone.They were quite a pair: Ben, the lanky, brainy, outgoing hunk; and Beth, quiet, small, breath-takingly beautiful. Still painfully shy, she was getting much more assertive around the family ... and, to our delight, she didn't put up with any crap at all from Ben.They went hand in hand everywhere.Ben said some of the boys in his class tried to tease him.