They attended a wedding together, and he came home and started packing a bag saying he was leaving her, and that the problems in the marriage were insurmountable. She was blindsided, said she didn’t realise they had problems and thought she was happily married. She found out a few weeks later, via a tabloid newspaper voicemail, that he was having an affair with one of his colleagues who was 14 years younger. They had photos etc. Messy divorce. She had a big contract at the time, and even though he was a wealthy guy himself, because she was the top earner, she ended up paying out a lot in a settlement. So he left, and instead of saying I have someone new, he took a cowards way out until he was outed.
That’s hard to recover from.