Finally Susan's boyfriend joins in by filling her ass

Susan continues to talk about being a naughty slut who needs punishment.

"Honey, I'm fucking another man in our bed. Right in front of you. And he has a ginormous cock. I think I might cum soon. Does that make me a slut? Is your girlfriend a nasty slut? What are you gonna do about it? Are you gonna punish me?" With the word punish Susan wiggles her ass a bit.

Her boyfriend's cock is finally raging hard. Seeing his girlfriend slut it up on front of him is turning him on. He slaps her ass hard and she screams in unmistakable pleasure.

He squirts some lube on her ass and then roughly sticks a finger in her ass and wiggles it around. "Ooooh!" she moans. "Is that all you've got?" she asks a minute later.

Finally Susan's boyfriend gets onto the bed behind her. You slow down your fucking of his girlfriend when Susan's boyfriend begins to press his modest-sized cock against her well-lubed ass.

Susan leans forward and you reach down to spread her ass cheeks. Her boyfriend pushes his cock forward. It's not just group sex, but it's a group effort to get Susan successfully double-penetrated.

Fortunately her boyfriend is too turned on to worry about hurting his girlfriend, because this was never going to happen without pain. So when Susan screams out he just continues pushing on, which is exactly when she wants. She wants the pain, she wants to be nasty. She has a t-shirt that says Proud Nasty Woman, and she thinks she'll wear it tomorrow.