Mother-in-law’s work drama

My mother-in-law has been having issues with a coworker for a while now – this person has been causing unnecessary drama and headaches for my MIL

MIL: …and she keeps saying things behind my back and being very passive aggressive

Me: Maybe you should be active aggressive

MIL: Well I wrote a letter to our boss and…

Me: Tell her she’s a pussy and then fight her

MIL: I don’t think that will help

I’m fairly certain I am the greatest son-in-law ever – at least top 10.