Teenager ruins aunt's custom sapphire engagement ring, and her mother demands that she get to keep it because stealing it and having to cut it was emotionally hard for her

This divorce opened a new family estate-sale category in which an ex-wife's sapphire engagement ring becomes available to whichever teenager can quietly remove it from a jewelry box and get it stuck on a swollen finger

The ring was custom-made, expensive, and, as every practical, reasonable, sane person would obviously know, intended to be saved for the woman, the rightful owner's daughter one day. Still, none of that seems to be particularly important for this woman's sister once the sister's daughter decides she likes it enough to try it on without permission. Which makes it pretty clear both the sister and niece are not practical, reasonable, or sane.