I love to do sex in the night time when i feel tired. Last night when i was feeling tired, i call my gf to come over my home and let’s have do some sex. But she was on her periods so she was not coming that night. I saw my step sister who was doing fingering in her pussy in the bathroom. I blackmail her to do sex with me or i will tell this to mom. She decides to do sex with me and also permit me to record the video.