Can she move in with me?

Alright...my girlfriend is 15, i'm 16, And her parents are not very nice to her. She's always stuck watching her brothers (ages 2 and 5) , she gets sick and no one helps her or takes care of her..she's always getting yelled at for no reason..it just isn't good for her...and it hurts me to see her upset all the time cause of the envirorment she lives in. i was wondering, Legally , if theres anything me or my parent/gaurdian, we can do to get her to live at my house..at least for a little bit...schools out, so thats not an issue...if her parents don't agree, is there anything i can do? (or my parents)..maybe if she's pregnant...cause thats possible at the moment too...she cant live with her parents if she is, that would be tooo stressfull for her.PLEASE HELP..