We were absolutely AMAZED that Higgins would go so long without peeing when he was little! He drank what seemed like quarts of water, but would hold it for 8 hours, no problem. I figured his whole body was one big bladder! Sure wish I had one like his!
I'm sure that if she has to go, she'll go.
And speaking of going.....congratulations on all the great outside potty training! You are doing MUCH better than I am!!!!