Leaving a marriage for adultery is legitimate, I think.
That being said, I think many (though probably not most) women agree with her. I think many (most?) men probably would quit on a marriage with a cheating wife, though.
I think the sexes look at this a little differently.
A woman knows a child she bears is half hers.
Men were not completely sure until DNA tests.
That is a big difference.
Men, especially ones with kids, cant afford to leave because the courts will award the kids to her + child support + alimony.
They couldn’t care less if she cheated.