She knows hypnotism

After the class ended, everyone but Ms. Richard and Alex leave the classroom. Once she is sure that they are alone, Ms. Richard approached Alex.

But instead of saying anything, she raised her right hand and then snap her fingers again!

"You will do what I said. Am I understood?" Miss Richard asked as she looked at the young man before her intentionally.

"Yes, Mistress." Alex said obediently with no signs of resisting at all.

"Now, I wanted you to say and write something for me. If I ended up pregnant with your child because what you did to me despite that it was an accident, you are willing to take responsibility of me. Now say it and then write it down with your signature!" Ms. Richard said sternly as she's looking at him.

"Yes, Mistress. I am willing to take responsibility if you ended up pregnant with my child despite what happened is an accident." Alex said as he's writing down a promise on a note and then sign it.

Once finished, she takes it from him and sign her own signature on it. And so, an engagement of sort is confirmed between them in case she ended up pregnant with his child.

"Alright. You are free to go now. And of course, you will be freed from my control and forgot what just happened as soon as you leave this classroom. Do you understand?" Miss Richard asked him as she's walking back to her desk with the note that he written with his and her signatures.

"Yes, Mistress." Alex said and then, he gets up from his chair and leave his classroom. And as soon as he left the classroom and the door behind him is shut, the effects of hypnotism is immediately washed away.

"Whoa! What just happened?!" Alex asked to no one in particular as he's rubbing his head.

After collecting himself for a moment, he leaves for somewhere else in the school with no knowledge that he just engaged himself to his female substitute teacher and that he may potentially gotten her pregnant!