I ejaculated on his buttocks to enrich him

I made the decision to give my step-sister a dose of my essence. She's always been a stunning young woman with those perky breasts that never fail to leave me captivated. I wanted to take her to a whole new level of pleasure, and nothing says 'I love you' like a load of cum on someone's butt. As I approached her from behind, I could see the surprise in her eyes, but she didn't object. I took my release and painted her firm derriere with my essence. The sight of her small tits shaking as she moved was enough to send me over the edge. I knew I had given her something special, a memory that would last. I hope she enjoys it as much as I do.