Wait she got abandoned by her family for sucking on fake titties as a CHILD? fr? As long as you arent hurting someone (unconsentually) or yourself it really doesnt matter. Just... teach to keep the freak behind doors?
I think it's far more reasonable to assume she was forced to switch schools because her parents divorced rather than her willingly choosing to do so because she wanted to avoid Azuki, and because of the awkwardness of recent events between them and likely living much further away to the point their relationship would end anyway she made no effort to stay in contact/talk about her feelings.