NC as super contentious.
Met
My DH when he was unhappily married . (Both would agree on this point)
I was separated but still livng in same house as ex DH.
Move on 15 years and all kids are grown. DH paid CMS and a few extras (with my encouragement) .. Ex wife married the man she was having an affair with...
Both couples are happy.. kids are happy and well blended.
Sometimes you simply marry the wrong person...
(Caveat ) neither couple had kids .. ?