He must be feeling pretty awkward about this, she realizes... She is basically telling him that something's messing with his mind without him knowing. Of course he isn't going to like it.

"I know. It doesn't sound like the memory's missing, more like...it's altered." Her own voice is pretty calm--she's a little worried about him, but on the other hand, it could be only temporary. "If it's just a curse, it probably doesn't mean anything. Maybe they'll come back tomorrow."