Gavinmad
Mr. Poopybutthole
I don't see how Cersei could have planned that shit with Euron, not knowing what was in the box. Was Euron's reaction genuine? Was he just gonna give the same speech except about dragons? Or did Cersei convince him to detour after the little show in the pit? That whole thing doesn't make sense to me.
I assume that they either conspired beforehand to have him make up some pretext to appear to be deserting, or she threatened/coerced him before he could leave the city.