It is nice to get a confession directly from Misukana, is not like she was keeping her intentions and actions hidden, but now we are on the clear and without any ambiguity on what kind of woman she is, of course as i have said before she is not doing this just to see how other people do, but to use them, she is getting blackmail material.
But this chapter generates some questions: was she a shitty person because of her brother or was she a shitty person before her brother? and is her brother a shitty person because of her, or was he a shitty person before her?
In short, who ruined who first?