Right into her mouth

The philosophy professor was Dr. Royas, an average looking woman with a curvy body - large breasts and wide hips, and a large ass.

"Audrey, this class will be boring, so suck my cock," said Jack. "No one will notice."

"What a great idea."

Audrey leaned over and took out Jack's cock. "Fuck, your big," she whispered before going down on him.

While Jack massaged Audrey's hair, he concentrated on Dr. Royas. She grew warm and removed her jacket. She arched her back to stretch and did not notice when four buttons popped off of her blouse, showing the class her white bra. When she turned to write something on the board, she dropped the chalk on the floor. When she went to pick it up, the seat of her slacks split wide open, and to the class's surprise, she wore white silk panties with Spank me! written across the seat in fancy script. The class chuckled, and a few snapped a few photos.

Dr. Royas did not notice her pants had split and stood up and wrote on the board. Thanks to Jack, she now had a fetish for being spanked, and all of her panties had Spank me! written across the seat. She even had a variety of paddles in her bedroom.

She turned around. "Oh, I've decided to give you an extra week on your papers. No need to spank me."

"Spank you?" asked one of the boys in class as the rest of the class laughed.

"Oh, I'm sorry. Slipped. 'Thank me' is what I meant to say." She blushed and smiled nervously before beginning her lecture.

Audrey kept sucking Jack off, and no one noticed.