I am at a loss for words, other than to reiterate a statement given to me by one of my T's.

It's their choice.

(He used his choice, when referring to my dad's choice in a second wife, but 'their' will suffice, to pass this one line to you.)

I grasped that one, rather immediately, and hope you can, use it to help you during this crisis moment in your home/family life.

As far as living there, albeit a fancy degree and all, which I can relate well to that piece of paper, what else can you do, to change your living situation? A couple of part time jobs? Finding a roommate, to move in with? Sounds like a toxic situation, to live around.