"I’m not attending because you didn’t greet me three years ago" ... Cousin-in-law sends text ahead of eldest daughter’s wedding [What do you think?]

[Financial News] A mother of a bride-to-be has shared how she was told that a relative would not attend her daughter’s wedding because of a past disciplinary incident and a greeting dispute within the family.
According to News 1 on the 8th, a post titled "I’m so upset because of a message from my husband’s cousin’s side ahead of my eldest daughter’s wedding" was uploaded to an online community on the 6th.
The writer, identified as A, has already married off her younger daughter and is now preparing for her eldest daughter’s wedding. At a time when she should have been focusing only on the happy occasion, what complicated her feelings was a message from B, the daughter of her husband’s cousin’s wife.
The tension between the two families goes back years. When A’s eldest daughter was going through a difficult adolescence and had become sensitive, B once scolded the child at a family gathering after she acted out, saying, "If you’re going to throw a tantrum, go home and do it. What kind of behavior is that in front of all the adults?"
The issue resurfaced three years ago at the reception for A’s younger daughter’s wedding. According to B’s side, A’s children greeted all the other older relatives but deliberately turned their backs and ignored B and her husband. A, however, said, "My married daughter, my family, and I all have no memory of behaving that way at the time."
The conflict came back into the open during the process of sending out invitations for the eldest daughter’s upcoming wedding. B’s husband, who is A’s cousin-in-law, contacted A’s husband separately after receiving the invitation. He said, "My wife seems to have been deeply hurt by what happened three years ago. Wouldn’t it be better for us not to attend this wedding?" He then effectively declined the invitation, adding, "It would probably be better if we don’t see each other for now, so let’s meet again on better terms next time."
A said she felt bewildered, adding, "Ahead of a once-in-a-lifetime day for my child, I feel bitter and frustrated that they would bring up old feelings from years ago just to say they are not coming."
Once the story became known, online users were sharply divided, with some saying the cousin’s family had gone too far and others criticizing A’s family’s behavior.
Those criticizing the cousin’s family said, "As an adult, B seems petty for holding onto a child’s immature behavior and hurt feelings from the past, then taking revenge by refusing to attend a major family celebration," and "If they weren’t going, they could have simply sent a gift and stayed away quietly. Instead, they deliberately brought up the old incident through the husband and caused more pain."
On the other hand, criticism of A and her children was just as strong. Some said, "If they openly turned their backs and didn’t greet anyone at the younger daughter’s reception, the other side must have felt deeply insulted," "Just because you don’t remember it doesn’t mean the hurt disappears," and "It is disappointing that, as parents, they did not apologize first and try to mend the relationship, but instead acted selfishly and focused only on their own daughter’s happy occasion."
moon@fnnews.com Moon Young-jin Reporter