This captured very well the old timey fairy tale feel, much more filled with the cruelt whimsy of the older style of tale. That poor woman, though I think she found a happyish ending in the end, embracing everything she hadn't had in life, the freedom to do whatever the hell she wanted to do. I thought the image of the troll with a cloak of mortality was an interesting image.
The logical side of my brain did balk a little bit at the boy being led on a chase until he died of old age... I mean, at some point, why didn't he just stop chasing, especially when he got old enough to not have the toddler-brain anymore. But this kind of story defies close logical examination, so it fit well enough, it just made me wonder how, practically, that could possibly make sense.