One of my oldest & dearest friends fell head over heels for a chap she met through a hobby. They were both married - in friend's case happily enough, dc, house, nice life, although the spark had definitely died. Friend had an affair with the OM, confessed to her dh & left him. Not great, fine, but shit happens.
Then ensued three years of absolute craziness.
OM was going to leave his wife. Definitely. Maybe next month. Maybe when he'd seen his eldest off to Uni. Maybe once he'd finished building their house. Maybe, maybe, maybe.
OM's wife found out & there ensued an understandable shitstorm. She threw him out, she took him back (& he went back). She threw him out again & he beat her up
. She called the police & had him arrested after he rocked up pissed at 2am insisting he loved only her & my friend was a 'whore' - friend was treated to the unfolding drama on speaker phone.
Friend collected him from the police station next day & took him in. He was very very sorry, apparently, that he'd called her a whore whilst begging his wife to take him back whilst also smashing most of his wife's windows...
Friend is still with him. He cheats on her fairly openly, is verbally abusive on a regular basis & her teenagers left years ago to live with their dad. He coerced her into getting pregnant a few years back, although she was sure she didn't want another child, then bullied her into an abortion because he changed his mind. He drinks a lot & is a vile drunk. But he's quite good at weeping & telling her he couldn't live without her, whenever she gets restive & thinks about leaving.
I love my friend, even though her choices wouldn't be mine. She's a highly intelligent, funny, kind woman in a professional role where she advises other people.
We have agreed to differ on her choice of partner. I won't be around him (he squared up to me once in the midst of all the madness, because he knew I'd told friend to run for the fucking hills...).
It's really not as easy as 'well you check up, you discover he's a wrong'un & you chuck him back in the sea' for many women. Sadly.