Make her prove it.

You decide that you need to test to see if she was serious about her offer. "Would you please stand over here?" You indicate for her to stand in front of the desk as you walk around her. She is skinnier up close, you can see her ribs faintly as well as some feint muscles in her flat stomach.

She blushes as you inspect her, the freckles on her cheeks glowing red as you view her closely snapping pictures focusing on the cleft of her camel toe and outline of her nipples, the green and white leotard leaving little to the imagination.

"I'd like you to bend over."

"Why?" She asks, clearly nervous.

"I want some shots of your ass and pussy," You reply.

She hesitates but leans over bracing herself on the desk for support. You look knowingly into the cameras to your front and left as you quietly unzip your fly and pull out your erect cock.

"I'm going to pull the leotard aside. We want to see your bare pussy on camera."

You pull the crotch of her pussy aside and as she looks back to see what you are doing you thrust your cock up inside her.

"Wait! Stop! What are you doing?"

"I thought you were ready for more than just posing," you hold her tiny down to the desk as you roughly fuck her cunt.

"I am," she manages, "I thought a **** fantasy might turn you on."