Hi, I am 19, my brother is 16, and my sister is 9. We lost our father three years ago in a work accident. Our mother has slowly become addicted to her prescription pain medication and now is in rehab for it as a result. She gave temporary guardianship to my cousin for my sister and a family friend for my brother. Things are now becoming apparent to everyone that my cousin has ulterior motives for wanting guardianship of my sister (specifically, monetary compensation). I would like to obtain guardianship, at least for my sister as I know my brother is safe where he is and happy. My mother agrees I would be the best fit as well now that her mind is less tainted by the medications. How do I go about obtaining guardianship (not custody) and is it possible if my mother already signed the forms?