I'm going to cease contact with a friend after she got back with her husband
Why would her getting back with her husband make you want to cut off contact?
Yes, I'm tired of listening to her life problems
It is wrong to cut off a friend when they need your help and advice. It is also good to tell her how you feel about the situation.
If she doesn't want my help, that's fine. She has her husband to rely on.
You don't need to help her to be a friend, you could just continue with your friendship. There's nothing wrong with helping someone every once in a while, and one day you may need her help back.