Unwanted Dry Humping Middle-Aged Man Dilemma Help!?

You are so right!!! This is definitely not okay. You really need someone to listen who is willing to help you with this. Talk to your mom again and tell her that you are uncomfortable and he scares you and you don't know what he will do next. If she still blows you off, you have to keep talking until someone cares enough to help you. Keep talking. Please do that - for you.