I like my stepdaughter inerwer

It started one day that she said she didn't feel good so she wanted to stay home. Her mom was out of town for a week so I told her it was fine. I remember being called from work telling me I was switching shifts so that day I wasn't going in to work. When I got back home I went in through the back door into our room so she never knew I was back. I remember hearing soft moans so I walked slowly into the house and I saw her laying in her bed naked, touching herself while she was watching porn. I watched her for a long time and the way she moaned had my dick throbbing. I started recording her. Some how she found her moms little vibrator and I know she was extremely horny. She sat up on the bed and she was rubbing herself on the vibrator and I never realized that the porn she was watching was a stepdad one. At this point she was moaning loud and I heard her say oh daddy I know you want me. I'm guessing she came because she stopped and as soon as she did I walked away slowly.