Watching my stepsister masturbating

I heard some weird noise coming from my stepsister's bedroom and I went to see what was going on. I saw her playing with her pretty pink pussy and it was so hot. I am actually watching my hot stepsister playing with her pussy. I wonder if she sees me if she would let me fuck her without telling to step-parents. She thought that everyone was out but I got back earlier and now I know what she's up to whenever she's home alone.