Oh, I don't know. I think the divorce rate during the 70s-80s speaks volumes.
As a Gen-Xer who was a teen throughout most of the 80s, divorce was rampant. While my parents stuck together, so many of my friend's families split it. And it often happened when one parent engaged in an affair. I recall the active suburban social lives my parents used to have. Lots of parties. Lots of get-togethers. Bowling leagues, bridge clubs, softball teams, block parties.
Of course, parents back then were much younger. Wasn't unusual at all for 16-year-olds to have parents who hadn't even hit 40 yet. A lot of these parents had social lives of their own and found other parents to hook up with and leave their current spouse for. Saw this on several occasions.
And they didn't call the 1970s the "Me decade" for nothing.
So many contemporary philosophies of that era stressed the need to make yourself happy, and spare no expense doing to do so, even if this meant ditching your family so you could embark on a pseudo-spiritual quest to "find myself."
A shame they didn't have the Internet back then - they could have spent all of their leisure time online!
Regards,