There is a distinct difference between doing nothing to prolong life and taking an active step to end life. That is the moral line that we cannot cross. We do not give life nor should we take it. Sorry, this one is not about me (or my children), but about a power higher than us all.
It's about what YOU would do, given a choice.
Obviously, you would choose to see your children deplete themselves on your behalf.
I would not.