My sister(65) purchased a home with in-law quarters together with her daughter and son-in-law in 2012, using most of the proceeds from the sale of her home as the down payment. My sister pays 1/3 of the mortgage and improvements on the home and her name is listed on the deed as co-owner. Her son-in-law is now proposing to have his mother, sister, brother-in-law and their daughter move into the home upon the sale of his mother's property in CA. This will be an untenable situation for her, as she has anxiety and OCD, and will not tolerate their presence for long. What rights does my sister have to prevent or limit their occupancy in her home? Thanks for any help you can offer!