How did their twisted worldview manage to come up with that?

The dawning realization that monogamy might not be so bad, coupled with a progressive need to be progressive and not be conservative/traditional, as well as the need to not be wrong. Something like that, I think.

Honestly, I don't think that one was especially nefarious; it really did seem to be a 'huh, I fucked up, this lifestyle isn't making me happy, but I don't want to admit anything even close to that being a housewife would make me happy.'