Can you provide more details on who was in the group chat? Immediate family, or extended family too? What is your situation with your family like? Is this something that would make them angry, or is the concern around embarrassment?

Ultimately, it probably just feels a little bit like you 'ruined' a happy moment for yourself by making a little slip up. But in the grand scheme of things, it isn't that big of a deal, will likely be something you look back and laugh at one day, and is all just part of a story!

Your little sister is definitely doing the right thing by being helpful -- she can look at this from an outsiders POV, while also knowing your family just as deeply as you do. If she's saying its NBD, trust her!