So I read this book a while back and I can't remember what the title or author is. I remember it's anout a boy and girl and their baby sister, and they all have some kind of power. Like the baby can speak to animals and stuff and I think one of the others can breath underwater or something. And they're one the run from someone. Also at one point, they are staying at the house of someone they think they can trust, but I think she ends up trying to hand them over to the dude that's looking for them. If anyone knows what this book is it would be really appreciated!