Some men don't like it when their wife (who they fucked over) finds another man either.
I have known a woman recently, whose husband left her and their 3 kids (aged 5 to 10 at the time,) and just moved in with another woman who he'd been seeing for a year. He gave up his job and started to basically be kept by this woman (who didn't mind because she was so chuffed to have 'WON' him!)
He gave up his job so he wouldn't have to provide for the 3 kids.
The woman I know almost had a nervous breakdown, she lost her home, she had to go full time at work and get her mom and sister to look after the kids while she was there. She struggled for more than a year, went from one temporary accommodation to another (every few months,) before finally being given a 3 bed flat in a rough area of the west midlands, and had to depend on handouts from kind friends and relatives for food.
Then 18 months after he left, she found a new man, and long story short, six months later, he moved in with her and the kids, and her life completely turned around. She was happy again, she had a man who cared for her and loved her, and he took her (and the 3 kids) to New York for her 35th birthday.
Shortly after they went, the ex popped up out of the woodwork, saying he wants custody of the kids (even though he had seen them just five times in 2 years,) and reported her new man to the police, saying he was a pedophile and he doesn't want his kids near him.
He also sent messages to this man's place of work calling him a pedophile, and a thief, and a pervert, and tried to cause all kinds of bother.
Upshot is, that he was INCENSED that his ex wife found another man, and a good one too, and it turns out things weren't so great with his new woman, and she had thrown him out and he was living with his mother PMSL.
Nasty, selfish, spiteful, entitled bastard is what he is. He left his wife in the shit, and turned his back on his kids, to be with some 'bit of the side,' and then when his wife got herself together and found another man, he couldn't stand it, and did everything he could to ruin things for them.
She has moved away now (with him and the kids) and her ex has no idea where they have gone. He obviously didn't get custody of the kids as he was laughed out of the office of the solicitor he went to.
We don't know where she is either. Only her mother and sister know. She and the kids, and her new man moved to get away from her ex. He is incensed that he can't get to her now, and has no idea how to find where they are.
I also know several other cases like this, where the man has fucked off with another woman because he is bored with the wife, then he has been furious when she finds someone else. Fucking selfish, entitled idiots! 
Finally, all these cases some posters have come up with about 'I know this man who left with no-one to go to, and they found someone quite quickly...' I don't believe it. I reckon he had that woman all along, LONG before he left his wife.