Young blonde wants a selfie with her cock in her mouth

My stepdaughter is uncontrollable. but it's my fault that she has something to blackmail me with. my stepdaughter has a very sexy body, so sometimes i enjoyed her taking pictures of her washing or changing clothes. i wanted the photos to jerk off. but she found the photos and now she uses them to blackmail me. she practically she does what she wants and i can't tell her anything. yesterday when i entered my room, she was in my bed photographing herself in lingerie. i asked her to leave the room, but she told me to take my pants off. my stepdaughter wanted to take pictures with my cock in her mouth. sure, i said no, but she started blackmailing me again.