So my wife says, "Did you see what my mum just posted on Facebook?" "No." "It's right here." "Not showing on my computer." *pause* "Shit. Looks like her account is set so only I see her posts." Emails go back and forth. Wife looks up and stares at me. "She's accidentally had it set to only display her posts to me FOR TWO YEARS. She always figured that nobody but me replied because she wasn't interesting." So yeah, my mother-in-law invented anti-social media.
It's more like making your own bulletin board, posting in it every day and then noticing after two years you never had an internet connection. It's a level of strange I just don't understand.
Reminds me of this movie I saw a long time ago called The Telephone. *SPOILER *Whoopi Goldberg talks on the phone to various people for 90 minutes to all sorts of comic antics. Only at the end do you find out the phone has been disconnected the whole time. It would have made a better Twilight Zone episode.
So she and your wife have been talking/planning this move back home to Jolly Olde England for 2 years behind your back? Hmmm... this all sounds strangely familiar to me. I think you should have a chat with ABM before you do anything rash here.