I shifted down and thrust and she froze as my thick cock slammed into her tight pussy.She mewed as I wiggled and pushed and slowly thrust into her dee...er. I let her go and moved down slightly before I began to fuck her slowly with deep thrusts. The fight was over now that I was inside her. She shivered as her tight pussy squeezed my cock and I groaned. The way she squeezed my cock was amazing.It started at the entrance and rippled and squeezed all the way down to her womb, which I was already. Sucking it just as firmly as he now felt his sister beginning to do to his prick."I swear Kathy, I'll fucking make you cum and embarrass the shit out of you," he said challengingly."You'll have to do better than that then," she challenged back, so caught up in the unusual game now that she wasn't even remotely considering the obvious implications of what either of them were actually doing. Kathy repositioned her own mouth over the head of Mark's cock, drawing it in, sucking it, holding it there. Inch by euphoric inch my rod sank into her warm inner sanctum, soaking me as slid and stretched her to louder and longer gasps and moans. This time I knew they were real and once or twice I thought she might try to stop me, but the feeling etched across her face was so intense I knew she neither could nor wanted to. Finally, my cock bottomed out inside her and she let out a soft cry. I spread her legs and grabbed her thighs to steady her as I rotated my hips and explored her most intimate. When her tasks were complete, Anna got up and stripped herself naked as well, revealing a freshly bare-shaven pussy for me with just a bit of fuzz re-growing.She noticed my gaze and answered the unspoken question. "Just did it Friday morning. I really wanted to be ready for you."She was ready for me. I could see the glistening moisture and the bright pink as her lips were already puffing out in anticipation. But I wanted to take my time with her.I held my arms up and Anna came into my embrace..