Help her up

"I'm sorry" you say

"This is a test that the studios have us perform, if a model is scared by the sight of a dick, then she is often ill suited to taking one up the ass."

A frown crosses her face, surprisingly she completely bought the bullshit line that you just made up.

"I do anal all the time though" she said

"Here, let me show you."

Before you could respond she was pressing her voluptuous ass against your pre-cum soaked cock. She masterfully pulled down her panties without losing a beat.

Her asshole was getting wet with pre-cum as she grinds it against your shaft.

Grabbing the base of your dick, you glide the head towards her eager asshole. With a bit of pressure it gives way, swallowing the head of your dick.

She yelps slightly "go slow please"

You bend her over the stool slowly slide your dick all the way in.

You rhythmically fuck her ass

You can feel the cum well up inside of you. Her asshole tightens around your cock causing you to grab her hips and release into her, pumping her asshole full of cum.