Yeah, you probably really need to use the mediator for that, then. You can talk about how pulling Sonny out of the house he's lived in for years would be really bad for him, and did she want to then buy your half of the house right now, etc. Those would probably somewhat affect her mind.

The most common thing done in that set-up is for either to buy the other half of the house. If they can't, then one can force the sale of the entire house. It would be a good idea to start looking at how much half the house is worth and whether you can change your mortgage.

And if FG ever becomes that close, see a real-estate lawyer before you choose how to own property.