you could try
I heard you xxxxx, you may be done, but the rest of us arn't, and we sit like a family at so and so's. If she continues then I would say to her if you continue repeating yourself, you will sit at the table by yourself while we read a story, so that you can learn to sit nicely.
She may be a bit to young for this, but I had to do his with a 3 year old a few years back and it took two days of said child not getting to watch he after lunch video, to learn to accept it when I say that I heard you.
Mind you she would spend her day repeating everything dozens of times, and it was driving me nuts. Almost makes me feel as if parents do n't stop what hey are doing at home to actually listen to their children.