You prompted her at her reception to do the right thing. She ignored your prompt.
Yes, she is an adult. This behavior — whether it was an oversight or deliberate — is her responsibility.
correct! And therefore:
You and your wife should tell her:
WHAT. NO. Your brother is an adult, your sister is an adult, and your daughter is an adult. If adults have issues with each other, they have means of communicating those issues and resolving them as adults.
If your brother told you he is pissed off, you can tell him, Hey, bro, I'm sorry you were hurt! I have no idea what actually happened and I make it a point not to mediate between adults, so feel free to communicate directly to Daughter if you'd like.
no subject
Dear Amy:
correct! And therefore:
WHAT. NO. Your brother is an adult, your sister is an adult, and your daughter is an adult. If adults have issues with each other, they have means of communicating those issues and resolving them as adults.
If your brother told you he is pissed off, you can tell him, Hey, bro, I'm sorry you were hurt! I have no idea what actually happened and I make it a point not to mediate between adults, so feel free to communicate directly to Daughter if you'd like.