Tenant divorcing, remaining tenant would not qualify

[Cooper B.]

I know there have been several threads on similar subjects in the past, but I couldn't find any with quite the same details.  Tenants moved in 2 months ago.  They are both on the lease.  They met rental qualifications only with their incomes combined.

I found out today the wife has moved out and plans to get a divorce.  She asked to be removed from the lease which I declined in the moment.  I reached out to the husband who says that he plans to stay.

The issue is that the husband on his own would not meet the rental qualifications.  I am assuming that the wife will not be contributing to the rent if she is no longer living there.  

So is there anything I should do at this point other than cross my fingers and hope that he keeps paying?