Particularly when there are kids involved, divorce is a drastic abandonment of an important commitment.
'Particularly when there are kids involved, infidelity
is a drastic abandonment of an important commitment', (my emphasis).
What is a parent going to tell their children when they are committing adultry? 'Hey, don't worry about it - I got a foot in both camps but I'm fulfilling my commitment to you to be an honest-to-god great role-model that you can always count and rely on to teach you how to do the right thing and really love your partner as you decide not to 'forsake all others'...I mean if you're going to highlight the 'til death do us part' bit - you got to give equal time to the forsaking all others bit.
Or, of course, you could lie through your teeth to your kids too and pretend to be something you're not, creating lies in place of what they thought was their life.
You know what? If my father was gonna cheat on my mother, or fall in love with another person through no fault of his own say, I'd rather he be a man and tell her and me than for me to find out years later that he was someone completely different from who I thought he was.
My friend found out when she was thirty-five that her father had been unfaithful to her mother and it blew her away. I mean, she had a nervous breakdown realizing that the man she thought she knew and loved as her emotional anchor was a cheat and a liar and nothing like what he presented himself to be.