Please tell me what you would do in this situation?

My 45 year old aunt has been dating a man who is nearly 60 4 a little over 2 years. He's still "very good friends" with his 2 much younger exes. And he's still doing them favors and seeing them on a regular basis. My aunt found out that the youngest woman (26) was living with this man while they were still dating. Yet she's still dealing with this man and taking her anger out on the women. The women hate her gutts. The youngest 1 locked her out of his house 3 times, threatened 2 fight her, called her a bunch of ugly names and they still keep on dealing with the man. What would you do if you were my aunt?