Hi DaisyGreen,
I wish I had some advices for you, but truth be told, I am awful in pretending and hiding how I feel. Family functions at my mother's house were always terrible and only started feeling better when I met my current husband...He is a genius in social engineering, he knows when to twist the subject to something else, he always has some kind of joke behind his sleeves and he is basically the one saving me everytime by releasing tension the second it rises.
How is your humor?
How is your greyrocking?
How good are you at faking it under emotional stress?
Since your sister, from what I remember, seems to have narcissistic traits, going the way of : making it all about her (make her talk about her work, her travel, her, her, her) to keep her attention off of you and your boyfriend maybe?
How is your father with your sister? And his wife? Can they handle most of the discussions, and you be a quiet listener?
Brainstorming here...
Also, how triggered do you feel around her and is it worth attending diner? Could something out of your control have happened that makes it impossible for you to attend? But you are free to see your father the next day, maybe...
