Sorry sent from my ipad hard to correct.
I remember when my mom was going through her divorce it seemed like all of the women around her, that is all they talked about. My mom was over it. She finally had to tell them she wanted to talk about other things.
She also suggested a few go and see a counselor to help them get past their feelings and their total focus on not being able to move on.
Some of them stayed her friends, even to this day and some she really never heard from again. Just be honest.. Even if they only spoke about shopping, eventually you would need to say, hey, lets talk about something else. I am over the shopping talk all of the time.
As for your friend speaking poorly about her children's father, you can share this with her.
I was a child of divorce. I knew the divorce was needed. They did not love each other and had not for a long time. When they told us they were getting a divorce I was relieved.
The only thing I can never totally forgive them for was the way they spoke about each other in front of me and my sister.
Your friend needs to remember her children love their father as much as they love her. They may be hiding it to stay on the moms good side, but the weight of the stress from this is very real to the children. Same if the dad speaks poorly of the mother.. it can make the child feel like, if you do not like or love my parent, and I am part of them, does that mean you really do not love me either?
These are true feelings. It is stressful to have to play along with the parent who is bad mouthing the other.
Once I became a parent I realized that it was selfish of them to do this to me and my sister. They were the adults and should have known better. it still hurts and I am now 50 years old.
It took my parents over 20 years to be able to be civil with one another. to even be in the same place without us All feeling stressed and uncomfortable.
It was shameful. I love them both and now things are great.. But your friend can avoid doing this to her children by, keeping it to herself. She can write it down, she can speak to a therapist, but she should NEVER speak poorly about their father in front of them again.
It is the best gift she can give them if the parents can respect the other parent in front of thier children.. Married or not.