In this particular case, it's my mom and MIL. Both are planning my shower and are supposed to work together, but I'm finding out otherwise. They're both mad at the other for various reasons and all the reasons are beyond silly (such as: "I was supposed to book the place and she did it instead" or "she already did some of the things I wanted to do".) I have not been involved because I didn't really want to be planning my own shower by any means, but after finding out all this garbage today, I feel like I have to referree! My mom is 61 and my MIL is 57 and it's pretty hilarious that they are fighting like 8th graders!!
Just thought I'd share. I find this all annoying but in many ways quite funny. Someone's gotta keep the future grandmothers of my children under control!