River Lynn wants her teacher's dick as a reward

Why is River Lynn in her teacher's house? Well, she passed a test. He jokingly mentioned that if she could pass his class he'd give her a reward. She's here to collect! What does she want as a reward? Well, for him to get naked and fuck her. That wasn't what he meant of course but she insists, that's what she wants! Well, she did earn it so...he gives her what she wants. I'm sure it didn't hurt to fuck this hot girl anyway.