I pleasure myself gazing at my stepsister's derriere as she stumbles upon me with her rear end, craving to straddle it

I was pleasuring myself when my stepsister stumbled upon me, her round, luscious ass in full view. She caught me, her big, beautiful tits on display, and things escalated from there.

I was lounging on the couch, my gaze fixated on my stepsister's voluptuous rear as she swayed her hips in the kitchen. Her round, luscious derriere was a sight to behold, and I found myself pleasuring myself as I fantasized about straddling her. However, my innocent reverie was abruptly interrupted when she stumbled upon me, her face twisted with anger. But as I revealed my throbbing member, her fury was replaced by lust, and she eagerly took it into her mouth, her soft lips skillfully working to bring me to ecstasy. Once I had thoroughly ravished her, I proceeded to take her from behind, my strong hands gripping her ample breasts as I thrust deeply into her. As I continued to sate my carnal desires, I couldn't resist indulging in her round, juicy ass, my fingers exploring every crevice before I plunged them into her as well.