Seto is a total idiot.
Also, completely unrealistic.
He basically rejected her over a lame excuse, though of course he doesn't see it that way. Ignoring the sex, which wasn't the most important part, they had a good mood, and snacks in the room. Why wouldn't they eat some food in the room, talk or cuddle or something else, and spend that time together they've been complaining about not having for the last several chapters?
Instead they ignore the food in the room, and end up playing cards all night. grrrrr