I don't think they're inappropriate at all - I think they're normal under the circumstances. In Codependent No More Beatty talks about how many spouses living with alcoholics daydream about the funeral.
With me, I can remove myself from the insanity by legal means (divorce), you cannot.
I'm sorry you had to grow up in that alcoholic mess, and I'm sorry your little brother is too. Thank goodness your Aunt stepped in.