Dear Amanda, my heart goes out to you through this very difficult time!

I don't know what to say, other than I'm nearing your parents' age in a few years and the support of children is so important, especially as one ages and has made mistakes through life, whether by accident, immaturity, or for any other reason. It is so great that you are supportive of your parents; at least they have someone who hasn't turned their back on them.
I really don't know what you can do about the siblings other than to try to mediate somehow, above all with kindness. You are doing everything you can to be supportive, sometimes that's ALL you can do! It seems you are the only reasonable one at this time, most everyone else seems to be in highly emotional state, and reason then flies out the window.
Meanwhile, be gentle to yourself. You can't let this ruin your life even though you are deeply saddened by these events. A cool, clear and kind person prevails in these traumatic events.
On a happy note, I'm VERY glad you joined us and become part of our family! There is deep and caring Love here,

and no judgments but plenty of opinions!
