My sister has moved my mom miles away and this is third time she has done this to stop me from seeing Mom. She has lied and involved my children in them, stating my son at 11 was trying to kill his nan, but my sister used my son day and night to stay at his nans when my she couldn't be bothered. She is using next of kin to stop me, my children and anyone who may tell me how Mom is or take pics to give me. I was told by a clerk at the hospital when she stopped us going onward that by law she cannot stop me as a daughter, but she has labeled me as a risk. My mom has COPD and numerous health issues with vascular dementia. I have told the home about the lies and they are shocked, but won't get involved and I don't want to travel miles to not see my mom. I've had to before and it killed me. Best is, my sister has taken a lot of cash from mom's banks and my dad's that should have been shared and from her brother-in-law. I have been made aware my dad made a policy of £60,000 for myself him and the sister that neither of us have seen, but coincidently the same after bought a house for exact same amount of cash that in total is missing. My mom does want to see us all, she has said that on phone, but my sister has now stopped us talking on phone and we now can't hear mom's voice.
As for your sister using funds from your parents account, it is expensive to live at a hospital [probably long-term-care] unless things are different in your country. Does your Dad need caregiving?