It's not clear why the second lady is so indifferent to a fuck in front of her? And the little black lady - they took it out on her ass and she continues to lie there quietly and doesn't run to the bathroom to wash up? Maybe she means that she fantasizes about sex, but nothing really happened.
Dad knows his stepdaughter is a slut. How can you not take advantage of that? Especially since the stepdaughter wants to go to a sleepover. And to get her stepfather to let her go - she is even ready to jerk him off and spread her legs.