@Purplelibraryguy
If I can be one more psychologists...
Midori is long used to the idea of her life not going the way she wants. Her personal life at least, because if you stop and think about this, she is doing very well for herself. She could very well live alone, but she can't, she desires someone to be there for her, even if he doesn't love her. She get's satisfied with very little, and no matter people saying that her actions make no sense, that she is dumb. Yes, she knows, she isn't normal, she can't act better. Just look how lost she is in this chapter, she can't stand for herself, is that hard to understand?
@Granuaile
Tazune isn't really that much a villain, there's a lot of man like him out there and is he making very clear since the beginning what he wants from Midori. He is getting all he wants from her. Doumyou will get what she wants. Even Midori is getting a bit of what she wanted.
I think that her epiphany is not that she don't want to be alone, is that she wants to be loved. Isn't that why she remembered about Maki when she was thinking about things she likes? Maki "likes" her back. Maki can be felt even when they're separated. This may be the fundamental realization that Midori is missing. Physical presence isn't what makes people truly close and the end to loneliness.
@elefantine97
This chapter was predictable and necessary.
The previous one ended with Midori rejecting Maki's proposal to "run away with her" (expected, Maki have zero plans and ideas to make this work) and wishing things would get better for her, eventually. She was wrong, things wound get better by itself while she does nothing to protect her happiness, this chapter came to show her this.
About the baby, isn't natural?
She can't help to feel a bit happy, and if Tazune don't treat her too bad and isn't too obvious with the cheating she could live for her child. It happens.
If one the memory of Maki didn't got in the way she could be one more unhappy wife, like so many others.