<human>: Can you provide a brief rundown of the text in within 3 sentences?

When I was 25 I was visiting home and woke up to my stepdad (been stepdad since I was 8) standing a few feet away from me watching me sleep, while he was masturbating. I confronted him right away which he denied it at first. My mother confronted him when she got home but my entire family has yet to really address the issue. I have one sister [F/29], a half brother (his kid with my mom) [M/11], and 2 stepsisters [F/29 and F/31]. My little brother does not know what happened, my sister does, and my two stepsisters told my mom they don't want to know what happened. I posted about this before under a name that I can't remember the password for so if you want to read the entire story here is the [link] but to keep things short thats the summary of what happened.

Fast forward to now, my stepsister is getting married in one year. She called me last week and left me a voicemail but I already knew why she was calling. My sister told me that she is going to ask me to be in her wedding. I was in my other stepsister's wedding over 5 years ago along with my other sisters so I guess she wants to carry on the tradition.

However, I have yet to return her call...I am unsure if I really feel like I should be in someone's wedding who claims they care about me and our relationship as sisters, yet does not want to know what her father did to me. We all group text here and there but by no means are as close as we once were. I am seeing a therapist for the first time ever but thought I would get the internet's take on it. Should I ignore my issues and suck it up and be in her wedding? Its her wedding and I don't want to wreck it....OR should I confront her and say that I WANT to accept but am hurt that her and her sister don't want to address things and know what their father did to me?
<bot>: Stepsister of almost 20 years wants me to be in her wedding, but doesn't want to know her father (my stepdad) touched himself in front of me. Should I be in her wedding or make my family address things?