A teacher

Jake turned around just in time to see his mom return dressed as a smoking hot sex ed professor. A simple, but skimpy design, she wore a pair of glasses (who knew vision assistance could be sexy?) pulled halfway down the bridge of her nose, a thin blouse, a tight black skirt, stockings, and black platform pumps. In her hand, she had a thick black dildo. That part... you had not given her. She must have brought it herself for show and tell.

She had a stern look on her face, however. She meant business.
"Settle down class!" She shouted. Jake had a feeling he knew where this was going, but still, he wanted to play along and get there, to really find out.

"Let's begin today's lesson. I hope everyone completed the reading assignment from last week. The chapter on tertiary sex organs may not be interesting to everyone, but I assure you..." She paused for effect, as she leaned down to show off her fantastic cleavage, "that it's very... Important... Information." She finished, as she slowly ran her hands over her breasts.

The rest of 'class' continued like this, Jake watched his mom pace back and forth, talking about anatomy and its functions, all while making some subtle, and some obvious, innuendos.

After the lesson, Jake's mom dismissed 'the class' but he was asked to stay. His mother mimed closing a door, before walking up to him, at the table. She really did believe she was teaching in a school right now! She grabbed a chair and sat down facing Jake, legs spread just enough apart to make it obvious what her intent was.

"Jake, let's go over some things. You normally are a fine student. You're on time, you're quiet in class, and you do your homework. But lately you've been slipping. Now, most of my students seem to work better when they're warned of their GPA dropping, for fear of losing a scholarship. But something tells me that... direct encouragement... would work better for you."

Jake gulped, and tried to control himself for a little longer.