Maria (Lambert) (Mack) Hildreth & Florence Adell (Hart) Mott: connection?

I just received information from obits on the Florence Adell Mott I have been chasing for years and find that she was born Feb 1855 in NY to Truman A. Hart and wife Esther E. (---).Florence md. William H. Mott ca 1881 and they had a son Truman A. Mott.
My question about Florence is this:what was her connection to a Maria (Lambert ) (Mack) Hildreth?In the will of Maria who died 1888 she left $50.00 to Florence Adell Mott, no relationship mentioned aswas done with the others to whom she made provisions.Somewhere in my Mack/Almy ancestry there is a known but unknown Mott family connection but it continues eludesthe two of us who have some photos and other itemsthat prove there is a connection but we just cannot find it.Also, the middle name Adell has been used by others who were known Mack descendants connected to my line/ancestry.

Am hoping someone can finally solve this mystery....