Responses
My gripe is if she just acted the way the little brother did (who exploded only after a few weeks) but it’s been a couple year for her...I think the husband would have reacted the same exact way and actually started to appreciate the mom.
I think that they had a divorced because Ryogo is y'know he's relying everything in his wife like chores and taking care of the twins and just leaves him alone because he's busy with his work. Yukiho must've got feed up on doing everything by herself without any help from her husband just like Natsuki said she didn't ask Ryogo, she want Ryogo to offer a help. So yeah she's not dead just left... But why did she left the twins I mean they're still a baby...