It might be wise to help her sell the house very quickly so it won't foreclose and she can still get some equity out of it.
Can she get into a senior hi-rise, assisted living complex that has different stages of care (i.e. independent living, partial then skilled care) so she can progress if & when she needs it. How is her health?
You can speak with the social worker at her doctor's office for living options. If she cannot afford her house right now, sadly, the next months won't be any brighter. Probably time to get her out of the house and access the equity in it for an apartment, or similar.
You might contact the Dept. of Aging:
Check out the resources at:
http://www.eldercare.gov/Eldercare.NET/Public/Index.aspx
Good luck.