The first time sensei talked about her problems on that long ass page many chapters ago I found it somehow relatable, I too am an adult woman with high education and what others could perceive for the outside as a well-dignified life, but insecurities about yourself and the impact of your work never go away, they just grow roots on the back of your mind over time. You start looking at your friends and comparing their apparent happiness with your never-ending void of solitude. I related to her, I really did, I myself don't have a partner (never had before) so insecurities about my own appeal, appearance, and personality are always eating me alive... Reading how sensei is taking advantage of a kid with a weaker mental fortitude than her has been not just disgusting, but is sinister how I am able to understand how she came up with that conclusion. She can't save herself she may as well control someone more fragile. She is seeing that kid as her last chance.