mom in laws

So my girlfriends mom called me a psycho and she's tired of my drama ... we were really close but her saying that kinda threw me off the edge with her .. she only said that because i went out to have a drink because I seen something on my girlfriends snapchat that involved her ex that she kept choosing over me, and her daughter decided to follow me there at 1 am. I didn't think it was a big deal I just wanted to go clear my mind ... does anyone have any advice about their significant others mother??