I don't remember if you've stated it somewhere, so apologies if I've been inattentive. Was Chinatsu unable to have children (give birth) or did se simply not want to? (Both is fine with me, but if it's the later my respect for her would go up - in the Narutoverse culture and time period for a (civilian and, it seems, shinobi as well) woman to have children is considered to find happiness, as far as I've gathered, so a possible decision to the opposite would show her strength of character to me)
Lang: Chinatsu has children. Being a mothering, protective figure is a big part of her characterization–see how she interacts with Kei in chapter 97, long after they’ve met. In this case, her nature is that of both a nurturer and a guardian, just like the character she’s based on. And she adopted two children–Roku and Tayuya–as well as taking over most of the childrearing involved with her niece, since Misaki didn’t seem like she was going to do a damn thing (as Rikuto pointed out in his section). While there is a cultural bias toward having children, particularly in more conservative climes, an individual woman’s choice to have them or not have them does not define her as a character.
Beta: Also, they never told Kei this detail, so she didn’t know, but Akira was trans. So while Chinatsu and Akira were both capable of having children, and Chinatsu as least said enough to say she wanted biological children, it didn’t work out that they could produce one together. But adopting kids turned out to work just fine for them.
Guess whose headcanon just became canon? Also, this is one of the reasons why the Chinatsugumi were so open to and accepting of Kaito also being trans (with the caveat this is now just an official reason for that because ideas change and occur over the course of writing a rough draft, and CYB is a very very long [and published as we go] rough draft).