humiliates them

You have the woman ignore your presence for now.

"OK, you two sluts, face each other."

Sara, still barking loudly and yanking the back of her panties up faces Sara who is still spanking herself and crying out "I need a huge cock in my ass!"

"With your free hands, rub each other's pussies. Try to get each other off and don't stop until I get back."

"ARF!"

"I need a huge cock in my ass!"

The woman folds her arms and watches with amusement and satisfaction.

You then have the woman notice you and want to obey you.

"Oh, hello, I'm Christina, but friends call me Tina."

"Hi, I want you to film these bitches humiliation and send me the videos. Go buy some bondage and BDSM gear while you leave them like this then come back and start filming. By the way, Maddie is the lowest on the totem pole, save the most humiliating and degrading tasks for her."

"Gotcha! Great idea!" She exhanges numbers with you. You leave with her, and she hails an uber while you go to your car.