Yeah, it might be due to that when they were writing dialogues some parts were written as "mom" instead of using the *anna_nickname* variable, it's a mistake, and it's not like she's in every route or connected to them, why isn't it that great? Are you not interested in her? Because that would be a first, I think you can kinda skip her a bit after a while, the only ones I think are heavily connected to her route are Toni and Celeste, the others don't really need her to be met, just explore the city