Sorry, I am going to have to agree with @TwigletsAndRadishes on this one.
Back in the mists of time, my Dad got Mum pregnant and as per the social expectations at the time, they married. With the benefit of hindsight as an adult, and looking back on their relationship, they were never meant to be.
They went on to have three children, my mum was raised very traditionally and knew marriage wasn't all hearts and flowers but she did expect loyalty, trust and faithfulness. None of which she got. My Dad had multiple flings and eventually Mum chucked him out, Years later, he still had the cheek to tell me it was Mums fault they got divorced as she was the one that chucked him out when he was willing to give it another go. I laughed at him and said he had a cheek as it wasn't his first affair and we had moved several times to "start afresh" after his latest fling. My Dad was a coward. In those days it was a stigma being divorced.
And yes my Dad was the author of his own destruction BUT, my Mum and Dad should never have been anything but a passing fling, they were just not suited. They were not in love, they were in lusty! Dad could have walked away and left mum to be a single parent which in those days was social disgrace, but he did not, he married her. They continued on to have three of us (I am the youngest), but they were both miserable and only us kids gave them a common bond.
My Dad behaved very badly, but then I do have to consider he married the wrong person and he was bitterly unhappy .
My Mum divorced my Dad. He went on to marry someone and live with them for 40+ years, he was a different person, loyal, and committed because she was the right someone for him. You couldn't have found a person more far removed from my Mum, in outlook, appearance, moral, standards and family sentiment if you tried.
I don't condone or forgive his behaviour but I can see why my parents were not suited. They should never have been together and if I am honest, although it would mean I never existed, I wish for my parents sake that they had split earlier and not tried to do the right thing by sticking together for us kids. They were very young when they married, very naïve and didn't really know themselves well enough, let alone, each other to be married.
For this reason alone, many years later, I and my Mum, found it in our hearts to forgive (but not forget) my Dads affairs and wished him well.
But from you perspective, I suppose my Dad did get what he deserved because wife no.2 was bloody weird.😉