I honestly thought he realized it earlier, he knows her voice.
It was through the screen so it might sounds different enough that he missed it initially.
Thank you for the chapter! Ooooh, we finally doing this‽
Debatable, since everyone (except Benika) has someone that's keeping them from blowing this powder keg outright.
Dad is worried about Rose for sure, maybe Gina too if he remembers about her, but he probably doesn't want Benika and Hibai (who to him should be 'normal') to panic.
(there's also his seal of confessional that would mean he can't out Rose as THE hitman from confession booth)
Rose obviously want to protect Benika and Dad and is wary of the 'church agents' (hah)
Both Gina and Hibai are wary of Rose and each other respectively.
So I don't think this group of people will cause restaurant chapter 2.0
The archbishop's exploding rosary on the other hand might just do it.