@rumred
My dad cheated on my mum. He married the main ow. They've been married decades. He's still cheating at 79 and they hate each other. It's miserable although I'm sure lots see it as a 'success' because they've been together so long and pretend it's all OK
He married the MAIN 'OW'? 
Great to know they are miserable though LOL. Serves the pair of them right. I guess your mum would never have had him back. I fucking wouldn't.
@pyongyang
Of the ones I know (sadly, quite a few), the ones who ended up with OW only did it because the wife found out and chucked them out and all of them tried to get the wife to have them back, while keeping the OW sweet for when/if the wife tells him to sod off.
Oh yeah, I know a number of men who cheated on their wife, then begged her to have him back, and then only went to the OW when he knew he had properly fucked it up with the wife. Must be a bummer for the mistress to know she is the lame second choice......... And as I said, I also know instances where the OW begged the wife to have him back, when she realise what a fucking loser he was.
Trouble is, by then, the wife he left has realised she is better off without him.
It's a case of 'be careful what you wish for.......'
(For the cheating twat of a man AND the mistress.)
I also know a few wives who, although they were upset initially, their husband leaving them was the best thing that happened to them......