If you are in b.c. I know for a fact because i ran away a lot when i was younger, that if you are over 14 you can choose to live whith whoever you want. police cant make you go home, nobody can. you wouldnt have any authority over your daughters friend other than what she herself would grant you so maybe this isnt a question of YOUR rights but HERS. Plus whether or not you beleive she is responsible enough to make proper desicions and listen to your rules, even though she legaly wouldnt have to. once again i know this to be true in british columbia, i have no idea about anywhere else.