I Discovered my Stepsister Masturbating and this Happened

I was just minding my own business, flipping through the channels on my laptop, when I stumbled upon something that would change my life forever. It was my stepsister, sitting there, eyes closed, fingers dancing on herself. I was stunned, but my body had other plans. My dick was hard, throbbing against my jeans. I couldn't look away. She was so beautiful, her big, natural tits bouncing with each movement. Her big nipples were hard, the pink tips peeking out from her dark areolas. I watched, mesmerized, as she worked her body, her fingers sliding in and out of her pussy. I was so close, I could almost taste her. Then, she turned around, and I saw her perfect, juicy ass. I couldn't hold back any longer. I grabbed my big, hard cock and started stroking, watching her squirm and moan. She looked so hot, so sexy. I could feel my orgasm building, my balls tingling. I couldn't wait any longer. I came all over her hand, my hot cum splattering on her perfect tits. She looked surprised, but then she smiled, licking my cum off her fingers. I was done for. I had a new addiction, and her name was my stepsister.