"Somehow, I don't think we've got to the part you're worried about..." Sis waved again, smiling crookedly. I sat gathering my thoughts. Alan came in a...d eyed me owlishly for a moment, then went off to play again. I think he knows when it's 'grownup time.'"No, you're right," I sighed. "We got to his place and were necking standing up in his living room and suddenly I got this ... compulsion! I can't explain it, really -- but suddenly I just HAD to GIVE him something! I peeled out of my clothes. “Oh….FUCK!!” He cried out. “Suck it babe! SUCK MY FUCKING COCK DRY!!!”Her mouth worked furiously as she swallowed again and again, and still he kept cumming. Just when he thought he was never going to stop his flow slowed, and a couple of desperate final spurts saw him totally and completely drained. His fingers relinquished their hold on her hair and his cock slid free as he collapsed to the floor, lying on his back with his heart pounding as though trying to break free of his chest.. ..c-c-cock...oh, oh god...up...up my..." She hesitated again then blurted out, "...my ass!" and continued to cry.I stepped in front of her. She raised her head and watched as I unfastened and unzipped my pants and stepped out of them, followed by my underwear. I stood with my erect cock in front of her face and said, "Lick." She immediately stuck out her tongue and began. I said, "Make sure you get it nice and wet or you'll lick it off after it's been up your ass."She did her best, considering. Don't worry about anything. You've got a lot more in your tank than you think!" What is this blue line on your tummy?'' I had no idea what he was talking about. ''You have this little blue line right above your pubes, Sylvia." I looked down and saw it too, but I couldn't bend myself over enough to really see it. It looked like it might be some tiny letters. ''Donnie, get down there and look. Maybe there is something going on with my body.'' He put his face down next to my puss. Then he started.