First of all, let me say that I’m sorry about your situation.
So, if I were you, I would talk to her. Explain, that there is a minimum, you, as landlord, are required to ensure that the rental property is livable. This i typically includes basic items such as running water, heat and working appliances, windows and doors.
If this doesn’t help, refer to lease agreement, which establishes the landlord's responsibilities the procedures for requesting repairs. Tell her that by signing the lease, the tenants agreed to these terms.