sorry I obviously posted on the wrong post! lol I think you should stick with your original plan. If it becomes and issue or you feel so inclined... give the other two kids something to do during the wedding (help pass out programs, give out throw petals or whatever might be easy to do)Then make sure your photographer gets a really cute photo of all three of them together for their parents. They could always be a huge help by playing with each other the whole time which will be a big help in it's self! good luck!