Exactly what it says on the tin.

My character has been accused of making a pass at a student--not true, but she's trying to get revenge on him for taking away her cell phone during class. This is just a subplot; my teacher character is a mentor for my MC, and the MC needs to learn how to face the villain without his help for a change, so this is pretty much my way of getting said mentor out of the way for a while.

The question is how out of the way would this actually put him? The teacher isn't a parent or legal guardian but my MC is an orphan, so he's been staying at this guy's house. I don't know exactly what would happen to my MC or the teacher character if this were to happen in real life.

Any suggestions? Ideas? Concerns? Questions? Thanks in advance!