My step-sister's entrance interrupts my porn-watching session, but her reaction is anything but scandalized. She takes one look at the black cock on my screen, then at my own throbbing erection, and decides to join in. Her big ass fills the frame as she straddles me, her wet pussy sliding down onto my shaft with a groan. We sync our movements to the porn, her big tits bouncing as she rides me, her juices mixing with the lube from the video. The room fills with the sounds of our slapping skin and her moans, a symphony of lust that drowns out the porn, making our own encounter the main event.