As ‘not actual’ sister-in-law, I found my step-sis’ wet and cute pussy, and her soaked and precious twat I pumped and then splurted on

One day, I just find myself in front of my non-related stepsisters’ genitals and it aroused some sort of desire within me. I enjoyed her as a sexual object probing her vagina; then I ejaculated into her, making her a virgin throughout the act.