With a pillow

Smiling, Adela grabs Grace's pillow and places it in the middle of her bed. "Show us on the pillow how you fuck a girl, Offender."

"Yes Detectives."

You move over to the pillow as instructed and straddle it between your legs. With your hands bound, it's an awkward position, but you begin thrusting anyway. As you do so, you turn to the camera, looking at it much like a deer in the headlights would.

"God, if that's how you fuck, I feel sorry for your girlfriend." Grace taunts.

The two girls cackle as Grace's camera captures your humiliation. Still, you find yourself **** to prove yourself, so you lean down, imagining how much easier it'd be with your hands unbound. Still, you give it all you've got, thrusting away as best you can. Despite your efforts, you're met with laughter from both girls.

"Oh my god." Adela chuckles. "You look so silly."

**** to gain some extra leverage, you lean down and put your head on the mattress as you continue to try and prove your worth.

"Is it a bit hard without your hands, Offender?" Grace taunts.

"Yes Detective Grace." You say, your breath growing more ragged.

"Do you want me to untie you?"

"Yes Detective Grace."

"Did I say stop?" Adela interjects.

You blink before realizing that you had indeed stopped humping the pillow underneath you.

Adela rolls her eyes. "Ugh... You're fucking hopeless. Detective Grace?"

"Yes Detective Adela?"

"I'm going to need you to demonstrate how to properly fuck a bitch. Think you're up to it?"

"Mhmm... More so than our little bitch here." Grace replies.

"I certainly hope so. Come over here."

You watch as Grace walks over to you, lubing up the strap-on as she does so. She wears a wicked grin on her face as she does so, knowing that there's only one way that you can satisfy her, and that is to become her bitch.