I wouldn't count her in your numbers and seriously just have her as your own. Seriously people calm down a little! For heavens sake a Mother with 4 or 5 children don't need to count them in there numbers? She is your granddaughter, I see the word daughter. I would just let all the parents be aware to cover all your basis.

Good luck with the new living situation! What an amazing lady you are to open your home and your heart for you family!