Eenie...
I was just reading back over this post again... realised how many different directions everyone is coming at this situation from..
and I was wondering... would it be possible for you at this point to more clearly define what you would like from any future replies? Advice in a certain direction, and so forth? Or would you rather the thread ended?
I think the main problem with the different viewpoints here is... some people have dealt with situations somewhat akin to yours.. some have dealt with truly nasty situations.... and some perhaps only see things from a certain point of view.
I know you are not a young teenager... at least I would guess so from the way you comport yourself and express your thoughts.... which is actually very admirable to me. I don't know many youngsters who would care so much and frequently (it seems) for their siblings... and in some way I think that is also bringing on the ire of some who would want to protect an obviously sweet, responsible person.
Though, again, you are (most likely) not a young teenager.... so in my view, I would not expect you to show the deference a younger child ought to. You are a person and deserving of respect and politeness and your own opinion, as well.
I think that, in light of all that, you are the person whos opinions on your own behaviour matters most of all. Controversial as that may be here, as a young adult, you are moving into making your own decisions on such matters.
If you will excuse me.. a portion of a bible verse...
"Commune with your own heart upon your bed, and be still."
Pretty much, you should reconcile all of your own actions within yourself, until you find yourself at peace. If that means knowing you need to change something in the future, then accept it and forgive yourself. If it means that you were in the right and need to continue to stand firm, then resolve to do so, but try to let go of any grudge, as much as you can.
In any case.. it's up to you what seems good and right to you. You are the one that will take the most away from these experiences, and it's up to you to decide on the character you want to cement in, before the world does it for you.
For me, I chose stubborn and always right
Maybe others don't always appreciate that so much... but I can reconcile my thoughts unto my own self and be at peace.. and that's what's important. The most cheerful, meek person in the world may not continue to be such a person if they are ignoring their own self identity in favor of that of others. So, it's about sustainability. What Eenie wants to be, versus what Eenie knows her emotions can sustain being, without breaking.
The grandlady
all of a few years older than you, is done speaking now