She distracts you with a thumb up your ass! (Surprise)

She leans forward and shoves her thumb deep into your gaping mouth!

"Suck!" she orders.

You immediately obey. I'm such a natural submissive, you think to yourself. The stream of vaginal fluids pooling down the crack of your ass continues. She shoves her thumb deeper into the back of you mouth but you expertly roll your tongue around the intruding member and increase the suction.

She abruptly withdrawals her thumb and resumes pressing the dildo against your vaginal opening.

The pressure builds...

You whimper in response.

The pressure builds...

She shoves her slick thumb deep into your tight asshole without warning!

"Ughhhhhhhhhh!" Your eyes bulge in surprise and instinctively relax you sphincters as you have been trained.

Pop!

The technician topples forward unsteadily as the phallus breaches your pussy entrance.

"I knew you would instinctively know how to relax your vaginal ring if I could make you relax your asshole," she says in triumph as she withdrawals her thumb from you butt.

You grunt as she shoves her thumb back into your mouth. It tastes clean. You are thankful that they must have given you an enema. You nosily suck her thumb just to be sure. She removes it again and grips the phallus tightly.