My MIL is such a leech!! Her and my husband went to lunch for his birthday and made HIM pay. Now, he's going out to dinner with his dad and brother for his birthday, and she invited herself so she can get another free meal. Seriously, go argue with your asshole girlfriend and leave my husband alone. He has a wife and son to provide for. You're a grown ass adult. You can stop acting like a helpless child now.