16 male here. I have a friend who is 15 and we were over at his house, and one thing lead to another and he had my cock in his mouth, and I pulled his pants down and used some oil as lube and got on top of him. I was fucking him in his butt and he was pulling away a bit asking me to stop and rest a bit so he could get used to it. I couldn't stop. In the commotion and with me sort of blacking out, as I was shooting my sperm up into his butt his mom walked in on us. She just stood there, I finished grunting and pulled my 7 inches out of her sons ass with an almost liquid sound and a plop at the end. She just stood there and stared at my cock and at his opened butthole. "Sorry" is all she said and shut the door. I got dressed and got out of there.