Steve: What makes you think they won't demand marriage? I think that reveals you are a little bigoted toward plus-size women. It may be that your son is the party who doesn't want to marry. In any event, you haven't said he's unhappy with his life, so I'd tell you to back off, Dad.
Mia: Right on, Steve. Let the guy live. And if a plus sized lady wants to get married, she'd get herself married.
Mia: Uh, #MeToo much? Doesn't matter how old you are, you have a position of power in the relationship even after he's gone back to school. Don't risk it for both of your sakes.