Is AUTHOR wrong in the post ? POST : Female, 30s, US, throwaway. On mobile, please forgive typos, etc. TW: child abuse.

TLDR - AITA for never wanting to go to another out-of-state wedding of my sibling's if they invite my abuser?

INFO: Sibling &amp; I are not super close, but not strained. More like friendly acquaintances, esp since they moved out of state, specifically to the state where our DeadBeat Dad lives. Sibling has a good relationship with DeadBeat. I have no relationship whatsoever with DeadBeat, due to the fact that he physically abused me when I was a toddler.

Mom had left him when pregnant with me, then took him back when I was about two or three years old. He was only with us for a year or so, but he beat and derided me pretty consistently throughout, as well as and verbally abusing our Mom and stealing from us/Mom's friends/our neighbors to support his crack cocaine habit.

Because he abused and traumatized me during early childhood development, I now suffer from clinical major depression &amp; generalized anxiety disorder, with regular anxiety- and panic-attacks. I've developed coping strategies, but a large part of me blames my suffering on DeadBeat. I still have vivid dreams and memories about the times he beat me every once in awhile.

So, Sibling doesn't remember this as they were a fetus/infant at the time. DeadBeat was imprisoned for theft and drugs basically right after they were born. They didn't have contact with him until they were already an adult. They grew up without ever knowing him &amp; always had a very romanticized view of what having him in our lives would be like. So when he offered them financial help for their newborn and a place to stay, they jumped at it. Understandable, I guess.

ISSUE: Sibling's 2nd wedding is coming up. DeadBeat will be there. I thought I was going to be able to handle being near him, esp. as Sibling assures me I don't even have to speak to him or his current wife. However, in these past months leading up to this wedding, my panic attacks &amp; overall anxiety have gotten much more frequent, and I've been struggling more with depressive episodes than I have in recent years. The only major change in my life has been this upcoming wedding. I think it's getting to me more than I initially thought it would. Not to mention that it's out of state, and I'm not in the best financial shape, so there's that added stress.  I also have student loans/debt &amp; I work a non-salaried/non-hourly job - can't really even afford to be going to this one, but I am. None of this is Sibling's fault, and I haven't told them at all.

I'm going to the wedding. I love Sibling and I want to be part of my niblings' lives. But a few weeks after the event, I plan to tell Sibling that this was a one-time-deal. I'm never going to be near DeadBeat ever again if I can help it.

WIBTA for telling them I'm not going to another event/wedding like this? Or should I just not say anything at all unless the situation arises in the future?