Since we had talked about lots of things and lots of fantasies, I asked him which one and he said...the one about sucking a dick. My mind was spinning...now, my cock had woke up, and I heard my voice telling G that I really wanted to suck a cock and taste some cum. G then told me to put on the cumshots video again and to watch it with him. I was so horny by then that I dropped my shorts and started to jackoff before I sat down to watch the movie. I watched excitedly as G got naked then he laid. "Fuck Sky, keep going and don't stop," she said as she pulled on my long hair.I grabbed hold of her ass, pulling her pussy against my tongue and lips, feeling her cum all over me and I loved it. I was raging hard knowing she was getting weak in the legs from it. Finally, I couldn't hold back any more and stood up with her legs spread out and pussy open already for me. I jerked my cock off that was covered in pre-cum, watching her rub her big tits while she looked to want my cock inside her. . I touched the tip ofmy penis, which was now no more than a nub. I felt my balls achemomentarily, and then the feeling dissipated as they retracted upwards,to be absorbed back into my body. The changes seemed to be unfolding inwaves, brief bursts of change between momentary pauses. The tingling wasbeginning to move away from my crotch to the rest of my frame. I wasbeing distracted by sensations elsewhere. In the mirror I couldn't helpbut watch in awe, heart racing, as the gradual transformation. There was an odd mix of embarrassment and pride on her face."Well, you seemed to really be into the idea of going to the beach when we talked about it yesterday. I just thought it would be funny to try but I never thought it would actually work." So you just sat around trying to think of a way to see your brother's dick?" I shot back."Oh, get over yourself. It's a penis. All guys have them. You're nothing special."Marcie then chimed in. "It's true that all guys have them but it did look pretty.