You snuck away to your bedroom because you found your stepsister's porn on the internet. You are jerking away, and she walks in on you. Once she sees that big dick of yours, she realizes she has to have it and soon enough she's riding your cock and having you hit it from behind. She wants to show you that she can make you cum harder than her porn can, but she also wants to control your orgasm with multiple countdowns. In the end she wants that cum all over her face and you're going to give her the biggest load of your life.