To give her the pleasure she craved. She had taught me well in the art of tease and denial, and today she would understand the torment and reward asso...ciated with lessons that I had learned.I positioned myself, so that I straddled her waist. I placed both hands on the clamps on her breasts. "On three, my slut! One...two...three!" A shattering cry rang through her bedroom, as I simultaneously released the clothes pins from her nipples. I moved my lips to kiss away the tears that now ran down her. "Where did you go, Marky?"Julie looked over and saw Mark hovering over his mother with his hand between her legs. He was staring at her. A moment of confusion hit. What was he-Mark lifted his hand from between Jo's legs and reached across the bed to Julie's face. His fingers were warm and wet and they squeezed her cheeks then slid into her mouth.Julie recognized the taste immediately. Mark's cum, mixed with pussy juice and whipped into a lather. Mark knew her so well. Semen had always been her. "I am going to enjoy this slut"And with that I felt a sharp pain in my ass as he forced his big cock into my virgin ass, I had never felt pain like it but I also kind of liked it. He kept forcing his cock deeper and deeper not pulling it back just pushing it in deeper until his full length was inside me then he pulled it all the way out and then back in again. He fucked me like this for ages fucking hard and fast. I had already cum in my sisters silk panties and I could feel the cum allover my. You seem to have a curious mixture of more experience than I would have expected and nothing at all.” She laughed. “And you make claims about your ability with such pure innocence that it’s incredibly endearing.” Taking my hand, she gave me a leering smile and chuckled before saying, “Take me to your den tiger.”Picking up the pace to the residence hall I couldn’t help laughing which triggered giggles of her own. We were like two kids coming home from grade school. She exhibited no embarrassment.