Do what the Dr. says !!

You start pushing your dick in faster and harder.

Dr. Bensen is holding on tightly to the counter in front of her to support your hard and steady thrusts.

"Oh my god!" she says as she moans with absolute pleasure.

You look down and see your dick moving in and out of her, and the area of her upper thigh getting wetter and shinier as you move. Her ass is moving forwards and back with every push you make. You squeeze her cheeks with your hands and spread them open. Her tight ass hole looks absolutly virginal, and begging to be opened.

You move your hand down to her pussy and collect some of her wetness, open her cheeks again, and spread her juice over her ass hole.

She moans "oh yes...oh, John!"

Without slowing down, you start rubbing your finger on her hole, waiting to see if it opens for you.

"Oh yeah...oh...yeah..." she's moaning at your touch....

Slowly, you push your finger in. It's so tight that you now want nothing but to fuck her there.