My partners friend, when single, had an affair with a woman who had two children. She left her partner for him. They then didn't work out, because he didn't like fact she had children 🤔A few years later, she sadly died of suicide, although it was mainly unrelated to the affair / breaking up of her family.
In the meantime, he went on to drunkenly kissing two best friends, at different times, causing a riff between them. He started a relationship with one of them, and strung her along for years - they had a mortgage agreed in principle, when he cheated on her, and suddenly left her for the OW.
OW got pregnant accidentally-on-purpose a few weeks in, and they are now together. She is extremely (and for good reason), worried about him cheating, to the point where she once messaged loads of his friends and family, saying he was having an affair. To my knowledge, this time he actually wasn't. They've been together 18 months, so we'll see how it goes...