Why not just redirect their mail via USPS change-of-address, back to where it belongs? Then the next weekend change the damn locks.
Love to, but that’s not an option with my mother’s devotion to this woman. She’d be mad as hell.
If anything, I think my bro and I need to “talk” to ma. All I want is her name off that address. That is what concerns me most and irritates me most (never mind her habits over decades).