My mom is in a Care center and I would like to visit her

My brother has executorship of my moms financials and I have been gone for a few years and would like to see my mom. My brother texted me and said if i went down to see my mom they would call the police and texted me back to say i could see her with supervised visits by my brother at his convenience , there are no restraining orders for me to not be able to see my mom or any reason to be, my question is because they are executors, do they have the right to tell the care center who can and cannot see my mom, if so what are my rights and what can i do