[the smiling weirwood]

She said housewives, not married women in general. Besides, none of this really has anything to do with three-headed dragons.

Dany's dragons are her children, whatever legacy she leaves will pass through them.

I also had a crazy thought, since three lives were sacrificed to make the dragons live(her son, Drogo, and the maegi) could the reverse also be true? If indeed it was the loss of those lives that woke the dragons. It could have been only the fire, but something tells me it wasn't just heat.