I had a super long day and all I wanted to do was unwind and decompress. No one else was home, so I took my clothes off and ran a nice warm bubble bath to soak in. I put on some relaxing music and got into the tub. I put some shower gel on a washcloth and lathered my body up as I cleaned it. I thought I saw the bathroom door open a little, but once I noticed the window cracked open, I assumed it was the wind moving it. I started fantasizing and let my hands explore my body. I was really getting into it, when the bathroom door moved again. I thought I heard someone, "Hello, anyone there?" The only sound was the music playing. I continued masterbating, sliding my fingers in and out of my pussy. I was rubbing my tits and feeling on myself with the other hand. Then I saw him.... my step dad was standing outside the door spying on me. I moaned louder and put on a sexy little show for him. It turned me on knowing that he was watching. My pussy was so swollen, I was edging. I moaned his name and started cumming. When I glanced at the door a few seconds later, he was gone. I felt like such a naughty slut.