I live with my 87 y.o. great aunt and WAS her caretaker. Her daughter wants her to move into her home. If aunt says no, must she go?

I have lived with my great aunt for the last seven years. As her chronic illnesses took a toll, I helped my mother do care-taking, beginning with dr. appts., and then began to take on more responsibility of my own volition (physical therapy, cooking, medication) especially after hospitalizations. She now needs assistance everyday with dressing, cooking and medication. Although forgetful, she is up on U.S. and Latin American politics and reads the Spanish newspaper. Up until Jan 2013, my great aunt's daughter had been involved to some degree, mainly wanting to be informed about dr.'s visits and her overall health. She visited or phone called daily and provided some care-giving but as she has seen her mother become more frail, the daughter wanted to take care of her mother full-time in her own home. In January 2013, her efforts became full scale and she took over all aspects of caretaking. Yes, she has the keys to our home and my great-aunt has accepted these overtures. The move to her daughter’s home would seem reasonable if: my great aunt agreed but she does not want to go as she has lived in the current home for over 20 years, and if the "new" home might offer the same comforts. Unfortunately, her daughter's home has a husband, 2 high school age teens, 1 young adult (21 y.o.), and frequent visits from grandchildren (ages 7-16) because the daughter will offer to babysit. Hers is a four bedroom house so great-aunt would fit but have to share a bathroom with either her daughter or the young people. My mother and I both disagree with her daughter. (We have an entwined extended family situation). She now lives with only myself and 2 pets in a quiet home which is less than 1 mile from daughter's work and 2 doors away from 1 granddaughter and 1/2 mile away from my mother. She has her own room and her own bathroom – privacy! We have not involved other family members since we are attempting to avoid the choosing of sides and creating a larger rift. My great-aunt keeps hedging, saying she will go to live with her daughter ‘one day’ but also states ‘she's not ready yet’. This gives mixed signals to the daughter, who has already begun to move my great-aunt's (hoarded) things from the garage. The daughter has stated she will "carry her out of the house if she has to." I don't think she has guardianship but she has taken a hold of the Social Security and IHSS (California's in home support services) checks - yes, my great-aunt signed the papers allowing this. The daughter has taken over all doctor’s appt.'s and takes all the medications to her home so that I cannot dispense medication anymore (thank goodness, nothing life-threatening, just petty.). My mother and I are no longer informed about her medical condition. The reason I don't think the daughter has guardianship is because the she can't afford a lawyer and I dont' think it's a ‘do-it yourself’ kind of paperwork. I have already spoken with Adult Protective Services and they say they can only intervene in health and safety issues not family mediation. My question is: can her daughter force my great-aunt to leave her current living situation? Can I call the police if she tries to physically force her to leave? (will they come or laugh at me?). I understand I have no legal standing but does my great-aunt?