"whatever oral agreement the OP has with his brother is enforceable and subject to the month to month termination provision of the landlord tenant statute."
If they were supposed to pay every week, do they have to abide by the week-to-week termination provision or month-to-month termination...
He wants her gone as well. They got into another fight and she had him arrested for communicating threats. She is saying that she is a tenant and must be legally evicted.