Masturbating and cumming in my stepsister's mouth while she sleeps

As I lay awake in bed, I couldn't resist the urge to stroke my cock. My stepsister was sleeping next to me, her mouth wide open. I decided to cum in her mouth, a long-time fantasy of mine. Despite not being related, the thrill was intense. I came hard, filling her mouth with my warm, sticky load. The taste of my cum stirred her awake, her eyes locking with mine. She didn't mind, it was almost like a silent agreement. We continued this secret routine, our relationship becoming more intimate. Every night, I'd wake up to pleasure myself and come in her mouth. It was our little secret, a taboo that added a spice to our relationship.