Zeph did not need his high intelligence stat to understand that when Nixi said she was starving it was a warning to him and an apology to Sonya because pretty kitty titty time was going to be after she ate as she was likely on the verge of losing herself to the hunger.
So the plan to peirce Sonya's nipples while they were both relaxed there in the bath, was going to be temporarily delayed until Zeph was done"feeding" his starving succubus girlfriend, or risk finding out how dangerous a starving lilin could be almost guaranteeing that he would also be her arresting officer and have to lock her in ES001 as she would be too dangerous to anyone else who was in holding.
Any relief she got from the tiny appetizer of Zeph's playing with her nipples during their short romantic moment was not enough to allow her to wait any longer.