Perverted annoying girl..seemed crazy acting the way she did.

She may be a bit sex deprived and a horn dog, but I don't see anything wrong with that at all. She only wanted to have sex with the man she loved, nothing wrong with that. And men generally love it if there women were more sexually active anyway! Itsuki was not exactly unwilling either, and he initiates it a lot of time as well, despite how horny she already was.