i took a video of myself masturbating and cumming. Then i sent it to my 16 year old stepdaughter 'by accident'. I was in my room, and I snuck across to her room to watch her reaction. She received it on her phone. I was peaking through her door when I watched her open the file. Her face was confused then shocked. She continued to watch and at the point of me cumming in the video, her eyes widened and she whispered oh my god!. I slipped back to my room, and text her again, this time saying, ' Oh ...... I just sent you a file. Please don't open it. Please delete it. That was meant for someone else. I quickly went to her door again. I watched her text me back and she replied, ' ok, I just did". Then i watched her watch the video again. I know she didnt delete it. I am so aroused at the idea that she watches me masturbate.