Meddling OVERBEARING mother in law is planning to move to my block!?

My mother in law is a REAL pain! An annoying, loud, obnoxious, overbearing, nosy and meddling in my business type of MIL! And she and her husband are now buying a home RIGHT NEXT TO US! I'm in horror! It was bad enough when she was living 6 miles away! Someone help me cope with this. My marriage will not survive this (it's already on its last legs and we're contemplating separation/divorce) and the last thing I need is to live next to my in-laws AFTER the divorce! I live in the same house I've lived in my whole life. I refuse to move! HELP!!! :***(