Her breathing became hard, talking dirty to her brother, made it far to interesting. "Thats right brother fill me.. I can't get pregnant so keep going." She said leaning up, bitting his ear. Her moans became very pleasurable, he sure knew what he was doing. Once this weekend was over she was going to have to try and wear something more unlikeable around her brother so they didnt feel like fucking right then and there, unless they wanted their parents to see what had happened this weekend. Although, there was another area they could, and that was in the room above their garage that was given to the two of them for school work and other stuff.