Is AUTHOR wrong in the post ? POST : This one comes with a story. 

I grew up with an awesome Dad. Here, i'll be using my dead nickname, Maddie. He loved me regardless of anything, when i told him i was gay (age 10, i just knew...) He told me he, and my mother, were Bisexual. He had diabetes and he got a wound on his foot two or three years ago. His foot couldn't heal and got infected. His infection spread to his blood and then, to his brain. His last words two me before he passed (February 16th, 2018), were "Don't worry about me Maddie. I love you no matter what." 

Two months after he passed away, my mom took a try at dating and ended up with my soon-to-be Stepmom. I like her stepmom, but i go into a panic whenever i think about attending their wedding. My Stepmom adores me and wants me to be there, but i'm avoiding the topic of the wedding regardless.

i will still be attending, regardless, as i am supposed to help plan, but i want to know... AITA for wanting to not attend my mother's wedding?

if referring to me in the comments, call me OP or Rin. Thank you. 