Something in my little doodler brain says that somethin' ain't right. Your mom has an opinion about your xW and she posts her opinion on Facebook. Your xW doesn't like your mom's opinion. So what? It's your xW's issue, not yours.
Maybe it's just me, and maybe I'm an outlier, but if my xW complained about something my mom posted on the internet, I'd tell my xW to print it out on some good quality paper and stuff it up her @ss. Problem solved.
