It was quite an adventure getting here, but I finally made it up to this point in the game to find out what happens when you die to her attack. Except you can't. The attack does no damage. As i'm typing this i'm watching her attack my character with kisses, but they aren't doing any damage.
Disappointing, really. I thought they would at least do some type of damage, but nope. Just normal kisses. Maybe if I go and turn myself into a frog and back something will happen???
EDIT: Changing into a frog did not change anything. She still did no damage, but I know her hits are registering because she changed me back into a human.