Yeah she replied Richard in a very defensive way...maybe even still trying to convince himself, and then Lex responds "Are You Sure" (one of the best lines in the film) and despite what everyone else says I still think that Jason was reacting to the Kryptonite. It didn't effect him completely like Clark because his powers have developed just starting to but the reaction in the face (along with already being scared of the situation) seemed to indicate a reaction of some kind to the mineral.