Will be great for them to have someone to turn to when Mom and Dad don't seem the right one to talk with.
My cousin lived with me when my eldest was in preschool. She from New Hampshire and us living in Utah at the time and they were worried he didn't know how to say his R's, and I had to let him know it was an east coast thing ;)
I'll always be here for those two and feel like I'd be a good influence...I'd like to think I'll be tough but fair on them, but they'll probably always get their way! Lol.