Approach her

Here goes nothing, you think, stepping towards her.

"Um, Mrs. Stevens?"

The pretty woman looks up from her packet, and gives you a curious look. "Oh, Michael. Good morning."

"Er, morning Mrs. Stevens." You take a breath. "I was just wondering, about the homework last night -- gaht!" As you stop a few feet beside her, your words fall back down your throat. You feel a soft round weight against your groin, pushing up and down against it, and grit your teeth at the hardness it instantly elicits in your cock. You look but don't believe it. Mrs. Steven's skirt-covered ass is riding against your now-erection. And yet she's saying absolutely nothing about it! In fact, as you look at her face, crotch rubbing ass below her, she is still patiently waiting for your question while you hold on to the board for balance.

I did it, you grip the ledge. It works on everyone in the school, too. Just as advertised!

"Yes, Michael?" Finally, the young teacher draws her butt back from your jeans-shackled schlong, returning to a much more proper posture. She doesn't even bother to smooth out her skirt. Her eyes still look at you expectantly, the hand the marker is in now lingering patiently at her side. "You were wondering..."