He punishes her with pleasure

"I'm going to make you enjoy sliding," Sarge says, slapping Amanda's right ass cheek as she stands up.

Hogtied and immobile, she can't see what he is doing.

He returns with the dildo on a stick (which was lubed off camera).
He starts to fuck her with it...

The impact makes her slide back and forth on the tarp.
She still hates the sticky substance.
She still loves the loss of control.

He decides to reward the model for her performance and for testing her limitations.

"I can't do you properly this way- as fun as it is."
He turns her over and fucks her pussy while she lays on her back.

He rubs her pussy, forcing her to cum!

The bit gag does little to silence her cries.

Hopefully nobody lives close enough to hear it.

Amanda is the type who cums hard and then gets really sensitive afterwards.
He teases her by stopping his rubbing, but continuing to thrust into her.

"Too much for you?"
She nods, appearing broken.

He sighs (feigning annoyance) and pulls it out of her pussy.
One last bit of fun though...

He rubs it up her body and teases rubbing the dildo (coated in her juices and lube) against her lips.

"You want a taste?"
She shakes her head.
"How about a bondage titty fuck? You have the equipment."
She shakes her head again.

"You're no fun," he says, standing up, "Well, I'm going to have one last bit of fun with you out here before returning.
No more sticky stuff- Scout's promise."

He walks off and the shot lingers on her until the transition.