My mother died intestate. She had no spouse. My brother and I are the only heirs and we both live in CA. She had money in her checking account when she passed and we used that money to pay her final expenses including medical bills and to pay the mortgage and HOA dues on the condo where she lived. But when the money ran out about 1 year later, we walked away and stopped making the mortgage payment and the HOA dues. Nothing was ever taken out of her name. My brother and I took whatever personal possesions we wanted and donated the rest to Goodwill. Our probate attorney closed the estate for us. Now my brother and I have been sued by the homeowners association for back fees. My brother and I are not the owners of the condo and don't understand how we can be sued. How should we proceed?