Stepfather threatens to tell the girls' mother what they were doing. He has the proof on his phone after all. But the girls have the phone now, and turn it around on him: they know their mother will believe them, and they'll tell her he's a creeper. Sophia decides that she wants to fuck him. It's been a while since she's had sex, and she knows he has to do anything they want. The girls start out with a blowjob, then Sophia rides stepfather's cock until she cums while looking right into her sister's eyes.
They filmed some of the action, so they plan to use it to get whatever they want from him from now on. They think they have the upper hand, but then he grabs onto Sophia's hips & ram himself inside her until he cums. "No! No! She's not on birth control!" Olivia shouts, but it's too late. Sophia is mad at her stepfather, but she did have a good time fucking him, and she might just do it again.