‘Don’t let the serum cook too long. And you must never tell anyone about this. I meant it for me, not for the company. But now, you must have it.�...� ‘But Uncle, what do you want me to do with it?’ ‘Why, DRINK IT, you idiot!’ His attempt to shout at me racked his body with pain. He lay back gasping. ‘You swore,’ he managed to say. ‘Yes, but Uncle, how can I drink some chemical potion that’s never been tested? I don’t know what it will do to me. In fact,’ I added, ‘I don’t even know what it’s. I toyed with his ass a bit but he seemed to stiffen and react negatively to that so I concentrated more on his cock. As much as I wanted to suck him dry I stopped, grabbed some oil, lubed my ass a bit more then slicked up that gorgeous cock. Getting on my hands and knees I told him, “Give it to me hard and deep, just save the cum for my mouth!” He couldn’t get that fuck-stick in me fast enough. Unfortunately he was only pumping in me for a minute or so when he shouted, “Get ready!” As he pulled. I realize I have one last opportunity to control this cunt-creature that is writhing under me. I want to ... I NEED to OWN this creature. I want to be consumed by her.I lift up on my knees and straighten my arms. She is strong and her pelvis rises up with me. My eyes are locked with hers. Slowly I straighten up onto my knees. She is still bucking her pelvis and pulling with her legs. I reach behind me and take her left hand. I pull it off my ass and lay it on the bed - straight out from her. It was was animal, it was emotional, it was the fundamental drive to reproduce, there was no thinking – just the mating instinct.I began to cry out the words that Sylvie had first released from me, “Yes, mom, Oh YES! Susan fuck me! I love you mom, I need you! I love you mom, so much, so much! I have to... I have to.... fuck you, I have to fuck you! I have to... I... I have to cum... CUM IN YOU NOOWWW!!!”Mom answered my orgasmic outburst, “YES!! Baby, do it to mommy, do it to me, give me your.