Enh... for the story to make sense she'd have had to die within weeks. And it's not from accelerated aging as she's not aged to a point where you'd have reason to be concerned. She says "soon" but... I figure with as young as she looks here... probably 15 years at least before the accelerated aging would kill her.
Also... no aspect of this conversation reads as "evil"... more angsty and morose with a morbid sense of humor....