Wow I thought Itsuki was a bit of a nutjob when he showed his own cuck porn tape in front of an entire party but this is next level. Perhaps the cure is worse than the disease...
Wonder if Rio became a piece of shit and started an OnlyFans to get some control back in her life. Both as a way to cope with a mentally unstable husband and to target Mahoro as she envied her (supposedly) simple and happy life. Momoka wondered what could have happened to her after all.
Basically what I said 2 chapters ago. Why would Rio go from a perfect man to an idiot like Rei if not because she found relief/change in an incompetent yet physically attractive man?
To begin with, nobody's perfect, and Itsuki handled the cuck situation too calmly early on, then wittheld information from Momoka. Then watched her flail around with imperfect evidence. He seems the condescending and controlling type I don't think we have enough to conclude that he was a problem in the relationship but it's definitely on the table.
I would bet money that Rio sold those videos as a way to appear financially stable next to her husband, and that her beauty salon isn't raking in the dough, leading to a growing inferiority complex.
So for the male cheater: Thinking that things will go easy and looking down at women while being a mommy-baby.
And the female cheater: Selling their sex video, making "anon" cheating account in the open, talking trash about her friend while cheating with her husband's, showing that she's better than her.
For me in those cases I have a question of "who pursued whom?" and "Did they know going in there was a marriage?"
If Momoka went after a dude she knew was married, then completely agree she's gross and not a good person.
But if she met a guy and didn't find out until later that he was married... love makes you do stupid shit like believe them when they say the Marriage is just a formality and they'll divorce soon. So I think in that case she'd just be "dumb with weak morals" instead of "gross with no morals"