Very much agree with you on this topic.Sure, but if Hana decided to whore herself at the club he probably be ok with it, if she was forced to yeah August would kill the one forcing her.
Anyway not seeing it happening, kinda out of character for Hana, could see Mina doing it to satisfy her curiosity, but not Hana
At current knowledge level Grace is the most detached character in the game, even more than Sophia and Kath. Sophia Lundgren is an eccentric with a highly abstracted and cerebral view on Life (and a major problem with social cues due to it), but that is a choice, she clearly acknowledges and feels emotions herself.This anticlimactic turn, so to speak, in Grace's subplot serves, in my view, precisely to portray how her personality suffers from intense emotional detachment. She believes she can "buy" anyone and, consequently, delegate any task, no matter how immoral it may be... this is the great proof of her difficulty in understanding human relationships in general (I’m not sure if due to some issue in the character’s past), how they work, and their usefulness in fostering emotional bonds... curiously, she uses the same behavioral patterns that alienated Ian to try to understand him and transform him into a "better and responsible" person... and I believe this is the main tragedy of her as a mother.
Kath is a hardcore sadist with a "naturally" following crippled and small emotional inventory, but the few emotions she is capable of experiencing, she does.
Grace on the other hand is emotionally deader than a zombie from "Army of Darkness", over the run of the game we learn from several sources how detached she is and how few love Ian received growing up. Vicki and Alice are more his mothers than Grace ever was.