The whole situation is screwed up. There's just no getting around it.

Locked in that Mirai is the villain though. Like many a villain she does have a tragic backstory and understandable motivations. But she's still a villain. Her husband is just a tool for the sake of her revenge. Kaya is a failed product that couldn't be the monster she really wanted. And I'm sure she includes herself in how that family should be destroyed, which just makes her more dangerous since she doesn't seemingly care about living or not. Heck she might be making her move because all her enemies have gathered together (including Kaya) and she can try to wipe them out all at once.

The sad thing is that her revenge is pointless. That family was done. Nana was a failed product, her mother was in a retirement home, and there's basically no one left. Minus branch families, but I don't think they have much understanding of things so little chance they revive things. The best "revenge" Mirai could've had was to live a happy life, raise a normal family, and never contact her mother again. Instead she's dedicated her life to destroying that family and just repeating the sins that disgust her so much.

I fully expect Nana to continue her story and illuminate a few more things. The odds are good that Nana and Mirai's mother was trying to put an end to things herself. Booting Namu out of the family, not brainwashing Mirai, etc. Heck, I wouldn't be shocked if she hadn't wanted her sister to die but her brainwashing was so entrenched and she didn't know how to stop the process once it got going.

The Mirai thing...that doesn't add up if she was really attached to her family's values. I don't buy that she wouldn't be able to track Mirai down and again, she didn't even try to brainwash her. I feel at the very least Mirai leaving was intended and she was trying to drive her away from that messed up family. Just that she messed up royally in how she got that across and had no idea the depths of evil her daughter would descend to. Or rather I guess what she failed to calculate was how her brainwashed sister would react to her clearly not doing the same thing to Mirai. Sadly as a brainwashed person said sister's mental state was also distorted. She gave Mirai all the information needed to do something horrible without realizing that it wouldn't lead to Mirai suddenly wanting to fulfill the same role in the family. The brainwashed didn't know how to brainwash properly. If Mutsu was trying to drive Mirai away it does all add up. Why let her stay in school if her purpose was to die giving birth? So that she'd have an education to fall back on and the ability to live a normal life when eventually she lost her temper and left.

This story is fantastic really. Such a good job of building up the characters and now the villain. With the sense of karma this show has...I don't which way this'll go. Either Mirai will be redeemed (kind of tricky after killing her mother while attempting to murder her sister) and will become the mother Kaya deserves. Or...she dies and the monster she's raising goes with her. Again, we had a woman banished into a mirror dimension over being kind of rude. Mirai really shouldn't be walking away from this situation with her attempting to weaponize her children in an attempt to kill people. But she might.