Respuesta :
Well I don’t know much about this but since ur parents gave u permission and ur sister is older than 21 it should be alght. Ik a cousin that is living with is living with her older cousins and they had no problems. Your parents can also call the owner just to make sure yk
If your parents gave permission and the court got involved, you would be okay. You could have your parents call the landlords or talk to them to let them know that you are given permission to live there with your sister.