Have an honest, heart to heart talk with them.

Sell the house and let the new owners deal with her.

You 65 and you are asking?

Oy vey! don't think I could ever live 24 hrs a day with someone anymore for just this reason.

For me it was ending a marriage that was making me unhappy. I broke it up into smaller pieces. I started with telling him I was unhappy, and why. The next conversation, a few weeks later, I made it clear I didn't think the problems were likely to be solved. After some time I asked for a separation. We are still working out the settlement, but I am looking forward to the next chapter. Just try to be gentle and good luck. It's a very hard thing.

Wow, that sucks. I'm not sure of the legalities but, on a practical level, maybe take any of your assets that they have access to and move them in a private account or a safe-deposit box before ending the relationship. Likewise for jewelry.

Never ever move in with someone you’re not intending to marry.

Pay someone to pretend they just had sex with you and get caught ....make sure it's another man. You'll never see her again

In no uncertain terms.

Very difficult. Goodness.