Comparison is the thief of joy

This woman believed she was the main character in her sister's wedding, but before I say more, let me relay the juicy details of the story. In typical family drama fashion, a Reddit user made an AITA post, asking whether or not she had been wrong in not attending her sister's wedding. The reason she did not want to go was simple: Her sister wanted a child-free wedding, and OP disapproved, thinking that her sister was being selfish (I mean, it's her wedding, so isn't that the one day she's allow…