Long story short, when I was 14 I was raped by my older biological brother. I won't go into the whole shebang but basically I was pressured to drop the charges etc and he was convicted on reduced charges. Didn't get a custodial sentence.
I'm now 25 with a 2.5 year old DS.
Most if not all of my family still see him and my sister and mother still have a close relationship with him.
Now, at various times I have been in the same room as him and gritted my teeth for the sake of the family. However, now I have my own DS to think of, who I want to shield from the sheer fucking mess of it all, I have decided I won't be attending family function with my DS if he is attending.
It's my DNephew's birthday party next weekend and of course my DSis has invited him and his girlfriend. So I have told her we won't be attending the party and I will take DN out with my DS in the morning.
She thinks IABU and I should "put my shit aside for an hour" and think about my DN.
She thinks it's silly as it's not like "he will hurt him"
I've basically told her to not push it, I've made up my mind.
Who IBU?