Sam moaned as he thrust harder into his mother, smiling as she chided him for spanking her..he knew she liked it, no matter what she said, just like he knew how much she loved anal sex. Thrusting harder and faster, he felt her ass grip him tighter and loosen with each thrust she gave to Rachel..the feeling was indescribable, and he loved every minute of it. Thrusting harder into his mother, gripping her hips tight, he moaned, coming close to his own peak..he knew he would cum soon, and he smiled. "Mm...M-Mom..C-Can I come on Rachel?" Sam asked Carmen with a moan, feeling himself getting closer and closer to exploding...he knew his sister loved to have sperm on her body, and he would be willing to donate if his mother allowed it.