Turned on by Masturbating Step Daughter

One of these times, very late one night I became aware of the sound of a vibrator, it was distant, but very distinctive, I knew the sound of my wife's vibrator! I got up, slowly made my way toward the sound coming from my step daughters room. Separated from our room by a bathroom. Standing just outside her door, I listened to her, hearing her gentle moans and her breathing getting heavier. 

My cock was hard in my boxers with pre- cum covering the head as I heard her quietly cum. I crept back to bed and made myself cum in seconds.

Satisfied sexually I went to the drawer where my wife kept her vibe, it was missing. Did she take it with her, or is Vicki borrowing it? Now I was ultra curious. 

 Arriving home from work the next day I decided to check again and the toy was back in its place. My wife and I had great sex that night, when she got home, she had no idea what was turning me on, figuring I just missed her so much LOL.

This situation played out several times and I decided to get a little brave. Another time with my wife away, and checking that the vibrator was again missing from our room, I cracked our bedroom door very slightly, pulled up some porn on my laptop and occasionally "by accident " I  started a clip and the sound of sex would break the silence in the house. Eventually I heard Vicki get up and go to the bathroom. As she came out, I was pretending to watch my porn but had an eye discretely on my door, I could see her pass by slowly, dwelling a little at the door.

I was so turned on, nervous but wanting to see what she would do. 

I heard her door close so I shut down my laptop and turned out my light, lying there quietly expecting to hear her masturbating.

I was lying on the bed on my back, cock in my hand slowly stroking. I was trying to hold off waitng to hear her. Then her door opened again, I froze, thinking she was heading back to the bathroom but I heard nothing, looking up with my eyes barely open I could see her peeking though my door. My heart was pounding, still frozen I wasn't sure what to do.

Almost instinctively I kept slowly jerking off. My cock was pointing straight up, I knew she could see me and it was exciting me beyond description. I shot cum high and it splashed down on my chest. I couldn't help but moan as I came. Immediately I saw her retreat and I heard her door close quietly, following about 10 minutes later by that familiar hum, and the erotic cycle continued.

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