She is broken (or so it seems)

She immediately goes weak(er) in the knees at the stimulation.
She nears orgasm within a moment or two.

You signal for the man to stop her short.

He adjusts her bondage, pulling her arms closer in to the rocks holding her hands down...

She can barely move.
She can't see.
She can't speak.

She's helpless (even more so) as you tell your man to resume his fun with the vibrator...

She cums this time.
She cums again.

You loosen the clasp holding her bent forward, not wanting her to be too damaged before she is sold.

The orgasmic punishment continues, however, as your man keeps the pressure on...and keeps his other hand busy too.

Another orgasm.

You approach her and signal for your man to stop.
You remove the metal orb covering her head.

A weak and exasperated woman is visible in front of you.

"Submit or this goes back on and you go back down."

She glances at the rocks.
She glances at you.

"I submit, Master."
"A good start."

An hour later, she stands submissively for you and your men- still naked.
Her new bondage is being put on slowly.

"Let's see if you do well and stay out of that again."

You gesture to the metal orbs that were once on her head and hands.
A reminder.