My Dad had numerous affairs during his marriage to my Mum, but one women kept popping up and he eventually left Mum for her. They married and have been together for 40years.
I love my Dad but do not condone his behaviour, he was a coward and we all paid a price for it.
Him and Mum married young and both had different ideas of what marriage was about and had been too naïve to discuss expectations beforehand. They were two drastically different people and I can see, as an adult, that they just weren't suited. Mum finally found the courage to kick him out and it was a big scandal as she was the first in her family to get a divorce.
Dads 2nd wife, we very weird but he obviously loved her. What got me though was that my mum was a very traditional housewife, she did everything, cooked, cleaned, worked full time and reared us kids. Mum was a very good looking women but she wasn't aware of it and she frequently looked tired because she had a lot to cope with and never had time to get her hair done. Dad would stick his hand out and shout coffee and mum would oblige. Who needed a TV remote control when you had mum and us. Dad said Mum wasn't needy enough, she was too independent.
Yet with his second wife, it was complete role reversal, he did the cooking cleaning etc. She had a meltdown if you asked her to put the heating on as she didn't do stuff like that, it was Dads job. She just looked immaculate, beautifully manicured nails, a variety of wigs (Dolly Parton one day and a Purdy the next - showing my age here). and I maybe biased but Mum was still way prettier!