I think you are all falling for the very obvious "twist". She did nothing lewd to her. You are falling for the same trick as Koguma.
I guess it depends on how far exactly she went and where Omichi's line for this kind of panic runs. Hino herself does admit that she did something that she usually does to Koguma, and I don't really see her lying to Koguma. Misrepresenting the truth by omitting important facts, always, but she's never outright lied to her. It remains to be seen whether she went too far or whether Omichi overreacts to something relatively innocent, but something Hino still would usually do to Koguma.