I Don't Understand Women

I don't understand them sometimes. It's my brother in law's birthday tonight, he's turning 21, but his gf made a huge fuss about it because she didn't like one of his friends gf's so she pretty much guilted him into staying in for the night. But since she did that she's going to treat him like shit for wanting to go and have fun. And instead of letting him enjoy his night and gaming with his brother she wants him to spend time with her bitchy ass to make her feel better. The whole situation just bothers me.