I could hear the slapping of their skin as they met and the squishes of their juices as he fucked her hard and fast. I watched them as she bucked back... against him, trying to get him as far into her as he could and making her groan in pleasure every time he hit bottom. The room became filled with their noises and soon he started coming inside her. He held himself against her as he came and she screamed out when she felt his come spurt up into her.“Oh fuck, fill my cunt with your hot come. Fill. Yeah sure, but he doesn't seem to have your touch," she said with a rue smile, "could you please." Sure sit down," he said and got behind her. Luckily the office was deserted. His fingers worked over her neck and slowly he lessened her pain."How's that?" he asked."Much better," she said, "but it's still there." I need to get further down your back," he said, "can you undo your zip a bit." Well I don't know," she said, he didn't say anything, just left it to her."Ok, but we'll have to be quick,". I grabbed her panties which were crusty from her lady juices and went back to my room and fell asleep. I woke up first the next morning forgetting why I felt so good. The I saw my sisters thong wrapped around my cock and remembered with a smile creaming all inside that cunt of hers. Around noon I heard her door open and her walk out in the same clothes I fucked her in last night. “Morning Ashley” I yelled smiling in spite of my self. She yelled something in audible back and I chuckled. A few. Then she reached down and pressed gently on her crotch through her short shorts. I couldn’t believe my own sister was a horny little cunt, getting excited from jerking me off. I began day-dreaming about her wet pussy and whether she also would be masturbating once she retired to her room tonight. Or whether she’d let me lick her cunt to return the favor she’d just done me. “Oops,” I thought, “Here comes another boner and me with no way to satisfy myself.”So I snuck into her room later and,.