Oh in-laws, aren't they just a couple of peaches? Sarcasm aside, they can truly be great people to enter your life, but the stories we find about them on the internet are often the opposite of that. Sometimes, monster-in-laws are a real life terror. Not always! But sometimes… For example, this Reddit story of a monster mother-in-law. This woman, before coming out and divorcing her than husband, had a mother-in-law who was her frenemy. the mother-in-law would present OP with fake pleasantries an…