It felt like hours as we both waited, and I continued to tell her how hot she looked.Then at the strike of seven we heard a knock at the door. My hear... began to race, and I felt a huge adrenalin rush as I opened up the door. Matt was much taller and bigger than I had imagined. He stood around 6'2, and somewhere near two hundred pounds. He was more on the muscular side, and he wore a tight shirt to go along with a tight pair of pants. He quickly made his way into our room without anyone seeing. He rubbed gel on his cock and her ass. His cock was huge to push in her tight ass but he was going to fuck her with every one of his thick inches. He aimed his cock at her ass and her eyes got huge as she knew what he was going to do to her ass. He pushed the end of his cock into her ass. She was tight and he had to go slow but he knew once inside her the fucking would be great. Slowly and inch by inch he invaded her tight ass. Half way in he stopped to let her adjust to his size then he. He thanked me like a hundred times when I got the balls to say that if he wanted I would give him the pair I have been wearing for 2 days. Matthew immediately said that if I was serious he would love to have them. I sent a picture of the crotch to him and teased him asking if he really wanted his sisters panties. I don't know why but it was a huge turn on writing if he wants his sisters dirty panties. I asked him if I was making him uncomfortable by saying that he loves his sisters. She gently bit it and pulled it away until it snapped back into place. Tears started to roll from Sarah’s eyes as she stuttered, “P-p-p-please st-stop.”“Let me see if you really mean that,” Alison whispered into Sarah’s ear. She took her left hand, while still holding the hair with her right, and placed it on Sarah’s thigh. She slowly slid her hand up and to the confines of her skirt until she reached her cotton panties. She held her hand on them and felt the wet spot that had soaked through.