A bit long time had passed before I chose last time but I think I already let her knew about that in previous update? Still, it is something cannot avoid about even if she knew it before I think.
Man, I feel like I'm a broken record... repeating the same words over and over and over and over again.
Grab that darn pdf walkthrough made by Mr Bubu and check it: it shows you EVERY game choice, EVERY game branching, EVERY game variable, and its consequences.
Now you gotta
realise that the most important choices with consequences affecting Mina's behaviour towards Edwin are
the choices you made when Edwin visited her and had sex and bath with her.
And now you have
another key choice in this update: when you have to choose between
being jealous / don't give a damn about the fact that she might call that dude ----> this is the most important key choice in the whole update affecting Mina & Hana paths, pals.