It's amazing how shitty and bloodthirsty people get with a dollar bill gets dropped in the pool.  Family members suddenly turn into ravenous zombies with no logical drive except "Greed.  Consume.  Money.  Greed."

It's your cash.  It sucks that they're willing to detonate your family over it - but it's **not your problem**.

She should have insurance.  At most, maybe her immediate kin help - her brothers, sisters, parents, or children.  They shouldn't be flipping over the third generation in line to shake you down for loose change.

If you want, put it in a 10 year account somewhere.  Somewhere you can't even touch it.  When they come sniffing just say "I invested it.  I can't touch it for a decade or more, sorry"