Her anus

Jennifer gives you a knowing smile. "Okay, boss," she says. With that, she pulls up her skirt to reveal her t-back thong. "I'll just dispose of these."

She drops the panties and bends over, squirting the oil on her ass. "This good for you, sir?"

You grin and reply, "That's great," as you free your member from your boxers. Jennifer's eyes widen. "Like what you see?" you ask her.

"Oh yeah... Slide that baby in!"

Needing no further encouragement from your secretary, you slide your dick along her crack and nestle it against her hole. Moving slowly at first, you press your rod in a little and ease it back out.

She arches her back and lowers her head, grunting slightly, pushing against you as you slip in a little further.

"Mmmmm, deeper... deeper..." she sighs, writhing with every insistent plunge into her.

You begin to pick up speed as she becomes accustomed to your cock reaming her. As she begins to moan, oohing and aahing with each thrust, you feel your balls tightening.