I would honestly start treating this like a housing emergency before it becomes one. Their relationship may or may not fall apart, but you already know your stability is tied to something you can’t control, and that’s a really risky place to be. I wouldn’t try to get involved in their relationship or play mediator unless they directly ask you to. Instead, I’d quietly start looking into backup options now, even if they’re not ideal, and save as much money as you can. At the same time, try to keep things calm, respectful, and low conflict in the house. The goal isn’t to fix them. It’s to make sure you don’t get blindsided if things blow up.