What I will expect from anyone that is going to get more than one month behind is that they convince me that their issue is primarily caused by the Corona outbreak/threat, they have looked into help from family/friends, looked into any social/church help available, and that they are doing side hustles to make some income.  

The only way it would help your cause is if she acted on your threat and moved on.

The decision to spend or save, to invest in new equipment and expand, or hoard cash, determines how many goods are sold, how many jobs will appear or disappear, etc. 

One week ago this was barely a threat on most people's radar in the REI community now, everyone has an opinion (including me).

Perhaps a visit to the water company together for a scheduled appointment with a supervisor is best, but don't know if this is feasible with the coronvirus threat these days.Whatever balance is outstanding after all these efforts I would probably propose to the tenant to split it after pointing out the clause in your lease.

In my experience (before I started having a property manager do screening) anybody with section 8 disappeared after seeing my screening criteria.Good luck

Typically the threat of filing a complaint with the regulatory agency will make them realize their mistake.  

Threats were flying from both sides and the cops were called.

But he is obviously incorrect on the lack of disclosure it’s clearly in the rental agreement  If to the best of your knowledge, it doesn't have mold, then it is an empty threat. 

If she refuses to get out after 30 days, start the eviction process.In my experience, most people will accept the 30-day and disappear because they're not happy with you.