A mother with four children attended her sister's wedding in a different country. A few days before the wedding, she found out that it was going to be child-free, which annoyed her. She managed to find arrangements for her three youngest children but brought her oldest child with her to the wedding.
During the wedding, the mother felt like her sister was ignoring them. After the wedding, the sister sent a message to the mother expressing her disappointment in the mother not respecting the "child-free part."
The mother replied that she had respected it but if there was a miscommunication, she was sorry. The sister insisted that the mother had disrespected her and demanded an apology. AITA in this situation?