Kasane - Vol. 3 Ch. 23 - What Ought to be Protected, What Ought to be Destroyed

[MangaDex]

 

[Denkiiki]

The abuse the MC goes through is endless

 

[Hacete]

I already have a good guess of what the plan is here. To make Nina's mother go through a series of doubts and questions, that she might just end up like her daughter's mental state.
Pure evil!