Without a doubt this is stupid drama that stems from an awkward MC and a vindictive woman.
However, a lot of hate is being thrown towards the wife, but it doesn’t change what MC said was ridiculously insensitive and hurtful. Firstly, she’s the one who was experiencing all these tough symptoms and bearing through it for the sake of their family. Yet he suggested for her to abandon the child which insults and disregards her dedication to the family and their bond/love in making this child. Secondly, motherhood is without a doubt a difficult time and with all the hormones and changes it does to the body, the husband could never understand even half of what she is experiencing so of course she’d be irritated he could casually say what he said when she’s holding on this much.
As an observer he made a rash suggestion. This is a difference in perspective that is brought forth by gender where the woman was struggling to bring a child to the world and the husband can only watch and try his best to be supportive. Without clearing up the misunderstanding after all these years of course things would get pretty awful, although her way of handling it is super extreme and comically over the top since all this manga wants to do for now is promote suffering.
The other kid and the glasses mom is a strange mix to push plot. Personally, seeing things progress without outside influence in the family would be more interesting but im still interested to see how things play out.