I know a pair of karma victims...
He was middle aged and married. OW was in her mid-20s and met him through his wife.
They started an affair. He left his wife, moved in with OW, had his vasectomy reversed because OW wanted kids. OW was pregnant before the divorce came through. He and OW eventually got married when the kid was 2.
All his family and friends thought he was being a dickhead. I was at the (expensive) wedding and it was one of the least joyous occasions ever because they were all clearly Team Ex-Wife. The OW's family were deeply religious and pissed off that their daughter had nicked someone else's husband, and also pissed off that it wasn't a 'real' (religious) wedding because he was divorced and their church wouldn't marry them. Long faces all round, everyone left the evening do by 9pm.
And then... he got made redundant from his cosy white-collar job. The (workshy) OW had to get an actual paying job for basically the first time in her life and was very unhappy about this. Then she discovered he'd been messaging other women. They had a long, bitter divorce after about 2 years of marriage.
In the years since then, he's finally managed to find a minimum wage job, and lives alone in a small flat. She had to move back in with her parents, who she doesn't get on with and who disapprove of her for behaving immorally. She's also got vastly obese (as has he). Both are still very much single, and that seems unlikely to change.
I feel very sorry for the kid, though.