I'm not sure exactly who Grandma Fibbins is. Well, I know what she looks like. This is Gran Fibbins and Ethel Brown/Clifton.
And this is Gran Fibbins and Dorothy May Brown/Clifton.
But who exactly is Gran Fibbins?
Frederick Charles Brown (b. 1861 d. 1936) was the son of John Brown (b. c1814 d. 1881) and Mary Ann Fibbins (b. c1835 d. 1901). The daughters depicted in these photos were born in 1890 and 1897 respectively. So Gran Fibbins is not Mary Ann, likewise Mary Ann's mother Sarah Ann Watkins (b. c1814 d. 1890) is ruled out.
A postcard sent to Ethel from her sister Lola (b. 1893) shows that Ethel at least was living with David Fibbins, either her great uncle or his son. (Lola is marked with the x)
If only we could make out a date on the postcard, my best guess from the clothing is somewhere before 1910. So perhaps Gran Fibbins is David Fibbins' (b. 1844 d. 1927) is second wife Ellen Gloucester Bell (b. 1871 d. 1945)? Maybe I will get lucky and someone will recognise her!