Change of Ownership: Landlord Passed Away. No One on Title and No Will. Son Wants Me to Pay Him Rent

My question involves landlord-tenant law in the State of: Missouri. My landlord passed away Feb.28 2019. She owed back taxes on the house I rent. She had no will and no other name on title to rental house. Her son, who has a different last name, lives in her home next door where she passed away. She had other houses she rented that have back taxes owed. She paid the property taxes but never paid taxes on the income she received from these rental homes. The son claims he and his aunt are paying the back taxes owed through an attorney's services. The son won't provide me a name of this attorney nor show me any paperwork to verify he's even hired an attorney. I paid the son one months rent to help him in purchasing food, and pay on utilities at the house he resides in next door. My feeling is that this is going to end up in probate court anyway. My question here is, should I pay him rent next month or insist on getting his attorney's name and set something up with him to pay rent. The son has no job. His name however, is on the home next door but not on the one I rented from his mother. I'm getting the feeling I should not pay him rent, especially since he wrote a bogus last name on the rent receipt book for this months rent where I reside. A lease was never signed with his mother, nor would she except my personal check. I always had to pay cash and the only records are from the receipt book which is in my possession. Any suggestions on how I should move forward with this situation will be very much appreciated.
Than You!!!

Change of Ownership: Landlord Passed Away. No One on Title and No Will. Son Wants Me to Pay Him Rent