Is she stupid or lacking any sense?

I have this good friend of mine who was married to a guy for 17 years. He (I am positive) is Gay and a drunk and drug addict, a horrible provider and a really sad excuse for a Father. They lived in her parents two family home and tortured her parents as he was a fairly bad guy. Finally she leaves him but for another guy. This guy is Married and 2x divorced and works with her.

She is a very pretty attractive girl who basically could get anyone. These two have been having an affair for close to a year now and she is forever on the phone with him. We finally convinced her to throw the husband out and he finally left in May and now the guy she is having the affair with (no kids) has finally left his wife. She is so wrapped up in this drama and chaos it is pathetic and she has a 12 year old daughter who knows it all as she hears the Mom constantly talking on the phone to the married guy. I feel terrible for the little girl as her Mom comes home late every night from work and then when she is home she is on the phone with him. How do I go about knocking some sense into her and letting her know what her real priorities should be?

When this New Year arrived and she knew she was about to take the plunge with getting her husband out of the house she said to me "this is the year about me" UH HELLO! you have a young daughter who is about to come into a single family household and this is the year about you???