FINALLY someone asks about her dad. Judging from the flash back... I'm guessing mom left Torhu to meet dad, or something? I will be pretty disappointed if the dad turns out to have been abusive or a deserter (sadly far too prevalent in American fiction and reality).
Hm... so it seems like Akito isn't feeling the summer weather. I have hayfever so I can sympathize - I'm allergic to pollen and sensitive to changes in atmospheric pressure - so I get headaches when it is windy or after the rain. Hope he's takin aspirin for his migraines! On the other hand, he seems to spend almost his entire life couped up in that room, hardly getting any sunlight. I don't know if he's staying in because of a physical ailment (possibly the curse?) or because of something psychological. Barely getting any sunglight, I'm guessing his vitamin d intake is pretty low and his immune system is not in the best of shape. Hattori would have told Akito this, so either Akito can't really come out (for whatever reason), or he won't.
Anyway, Shigure is playing with fire here. Yes, Akito is an ass, but he's the head of the family (for whatever reason) and possibly holds actual powers (be it the Zodiac or something to do with the curse). What Akito does (and what happens to Akito) has the potential the affect the entire Souma clan, with the lives of hundreds of people at stake. With Akito as fragile and as neurotic as he is already, Shigure toying around with Akito for the lolz is a receipe for disaster. Since it doesn't seem like Akito can be replaced, then the best thing to do is to change Akito. This is one of those situations where if you have anything constructive to say, then don't say it.
I have a very bad feeling that - with Akito's psychological issues, his feeling of abandonment by the rest of his so-called "family", and Shigure's constant mocking - Akito may very well explode, and it will have disasterous repercussions for everybody involved.
I will never get over how Hiro and Kisa are ostensibly 10/11 year olds but they act like they're in their late teens.