So, who is the a–hole in this situation? Reddit users agreed the OP was NTA, or not the a–hole.
“NTA. Any decision made about a wedding should be up to the people planning that wedding and about those people,” one person pointed out. “You absolutely know that if your stepsister was planning a wedding and you couldn’t attend that your mom would insist you put that other event aside. I’m so sorry this is how your mom continually treated you and your brother. You are important OP. You matter!”
Another Reddit user declared, “Your mom is yet another person who has tried to force a blended family only to have it blow up in her face.”
“You’re NTA,” someone else commented. “Your mom has made her position clear: for 19 years she has tried to curry favor with her stepdaughter by prioritizing her over you and your brother.”
But that person wasn’t finished, adding, “Now you have made your position clear: you will live your own life without revolving events around the convenience of your stepsister. Good for you.”