Once they find out the dad has a key, I dunno, just change the fucking lock. It takes like 5 minutes to change a lock.
But that point, that the dad may have been coming and going as he pleased for a while, that's fucking creepy.
Given Maya's already enrolled, if the dad finds out and and stops the payments, I imagine it doesn't mean that she is suddenly kicked out of college. She'd surely be paid up until the end of the semester or something.
So here's a simple solution. Instead of the girls running to the MC to get their problems solved, why doesn't Josy fuck her way through college on a Quinn's Restaurant funded scholarship, and redirect her dad's payments to Maya. Bang, everyone wins, including the incest crowd when Tommy finds out it's Josy on the other side of the toilet stall sucking his fat one.
And then MC can spend his 5K over at the Pink Rose guilt free. "Hi Nicole, oh, another freebie, this day just keeps getting better."