"You've done pretty well so I'm going to give you a reward."
"I'll play with my tits and you can wank your raw little cock - give me 'number X' full, hard strokes. Give that battered little thing some pleasure!"
"OK that's enough of that."
She leans over and unties your balls.
"Now listen up, fuckwit, this was your last class with a trained teacher. However, I have volunteered your time to help a female student of mine who needs a boy to play with for her practical exam."
She gives you directions to get to the 'training room'. She tells you that the girl will play some games with you and will be examined based on how well she puts into practice the things that she's been learning in her classes.
"The room has a camera in it so she can be examined by her teachers. You better perform well for her!"
"After you're done there, you will be sitting your femdom exam!"