She's always had a loud mouth on her and posts personal stuff on Facebook. However as of late she's gone too far. My parents got divorced a couple years ago and she's remarried and has a baby (my brother), however, ever since my dad got a girlfriend she's been rude to him and talking about how his new girlfriend isn't anything to look at. The new girlfriend posted a picture of her and my dad on Facebook and my mom went to her profile and said something rude to her. They're not even friends on Facebook which means my mom had to be looking her up. My dad is also a musician and my mom texted me tonight at midnight to tell my dad not to play their song anymore out of respect for her. This is after two years of divorce! I don't know what to do, what can I say to her?
She's not crazy, she's obsessed. Either really hates the guy or is still in love. I'd go with the latter.