Kid throwing tantrum at your child's birthday party?

At my daughter 7th birthday party we had a child slightly younger than her throw the mother of all fits. I had no idea how to deal with that as the mom just kept shushing him and telling him to stop.

This went on for like 15 minutes, no lie. I was so upset but didn't want to be rude and ask them to leave. Finally she left, and everyone around breathed a sigh of relief. Several people commented that it was rude of her to allow the boy to cry, scream and carry on during the party.

What is your take on this? We are talking six and seven year olds here. Granted, this was ten years ago but I still wonder if I handled it right by not asking them to leave. What would you have done?

    I don't know what I would do in this situation. I don't recall having a party where someone didn't get upset, to be honest.
    About Melissa
    Birth: December 31
    On since: Mar 3, 2014
    I am a single mom of two fantastic kiddos that I love to pieces. Currently in school working towards my teaching degree. You can find me most days on when I am not here chit chatting! :)