One of my best friends. Met husband first day of uni and got married literally after they graduated.
They were too young. This carries on for more years. She pushes to have a baby even though he’s not keen. They aren’t happy and from my point of view it’s quite a sad/dull marriage, baby makes this worse not better.
He tells her he has feelings for someone at work but has done nothing. She goes ballistic. They split, get back together, have marriage counselling, he changes job.
Eventually they do split because they are both so unhappy.
She moves with his permission that he will still see son, she meets someone else gets married says she is much happier and admits first marriage was miserable and a mistake. Ex married other woman also much happier.
She has spent 10 years making life as difficult as possible for ex. She has totally destroyed relationship with their son. She can’t let it go. Son is 18 now and so they need no contact but her constant hatred and venom is ridiculous. We aren’t friends anymore. He did her a massive favour when one of her parents was dying and she literally treated him like dirt over it.
Also my SIL who I thought was a sensible person. There was a small falling out between MIL and BIL (his fault) and she fuelled it into a massive falling out. MIL was very poorly in the last few months and SIL went round once. At funeral she told everyone she had cared for her day and night.