Ouster refers to the actions of people who own property together. They are co-tenants or tenants in common.
Each co-tenant in any real property is entitled to use, occupy, possess, and enjoy the entire property, but not exclusively. In addition, a co-tenant must act in a manner that is not detrimental to the other co-tenant's ownership and enjoyment of the property. A co-tenant in possession who excludes another co-tenant is liable to the excluded cotenant for the rental value of his or her possession. Cotenants are not responsible for rent unless there is an ouster. If one co-tenant ousts the other co-tenant or denies use of the property, then the tenant who committed the ouster or denial must pay the fair market rental value for the property for the duration of time that he or she remained on the property as a result of the ouster. 04-18-00402-CV