It definitely exists. I've witnessed it in public places and I've had friends who have mothers who were/are extremly violent towards their husbands/boyfriends. The woman who lives next door to my cousin is really, really controlling. One day she chased her boyfriend out of the house with a pot of hot water and a pan. She threw the water in his face and smacked him with the pot then punched him. I was sitting on my cousin's porch once and I guess the woman's boyfriend snuck out of the house and she was right their at the door yelling at him for not telling anyone he was leaving. He doesn't live at the house anymore, but she's still there.