she would never in a million years consider it an act of selflessness. to my knowledge, nothing i have ever done has been considered an act of selflessness. she always thinks i'm somehow playing an angle or scheming against her.
THIS.
You cannot know what their interpretation of events will be, and even in the most selfless and thoughtful actions/offers my ex would 'tell' me what my intentions were, and they were BAD. Very bad. Never good. Never my actual good intentions to help, assist, do something nice.
I have no doubt in this situation you would have then been punished in some way for ruining the weekend if you were home...because you were 'mad' that you two couldn't go (which would not be true), or even you 'ruined' the chance for you both to go (untrue), or you don't make enough money for you both to go, or..., or...
It's this story-telling quality that I first brought up with her, early in our relationship. I told her "you seem to have stories about me that aren't true, then you react to those stories." This is long before I knew anything about bpd or cptsd.
Naturally I would explain my intentions, which then would be me 'making excuses' and 'I don't want to hear your excuses!'. To something I didn't do.
Baffling.