You are NOT a narcissist!!! (that I can tell, at all)
You have done absolutely nothing wrong.
What you have described... is exactly and very predictably what people with NPD will do.
This is, actually, one of the very, hallmark, diagnostic things with NPD. The person(s) with NPD will take absolutely NO responsibility, and/or accept NO fault with anything.
They struggle constantly, very very very hard, on a day-by-day, moment by moment, basis, to continuewith, and to justify, their belief that they are 'perfect', that they are 'superior'. (And, having a chosen subjective 'victim' is a very big part of that.)
They can process nothing other than this in their mind.
If you choose to believe, or do, anything other than they give you permission to, then YOU are the narcissist, because you, (naturally and normally) sometimes put your individual needs first.
They will, always and forever,believe that the other person is the 'narcissist'.
They can accept absolutely NO blame or responsibility, and the words 'I am sorry', is simply NOT in their vocabulary.
The response to this, by other people and loved ones, is to think... Won't they ever 'see' this. Won't they ever be 'sorry'.
And, just neurologically, this is just not eve possible. It is just not going to happen.
Also, by not hearing back from your sisters...
A person with NPD truly believes that by ignoring or cutting somebody else off, they are 'punishing' them.
They really do.
None of these things are reasonable or sane.
That is the nature of the beast!!!!