she catches her stepbrother blair williams masturbating with his porn video

My mom asked me to call my stepbrother blair williams for dinner. but when i entered his room, i caught him masturbating. he's so cheeky he didn't even try to cover his dick, he just kept jerking off while i was in the living room. but not only that, my stepbrother had discovered my porn video and was jerking off with the recording. he asked me to help him with the straw and I had no choice. he hinted that he was a threat and couldn't tell my mother. I went to bed and gave him a blowjob. but then my mom came in and I had to hide under the sheet. and when he left the room, we continued to fuck.