Hi Willow,
On the 1911 census I have found in Castleford
GODBER, James Head Married M 25 1886 Miner Coal Hewer Nottinghamshire in Ashford
GODBER, Elizabeth Rebecca Jane Wife Married 5 years F 25 1886 Household Duties York Normanton
GODBER, Francis Son M 4 1907 Canada
GODBER, Sarah Elizabeth Daughter F 1 1910 Yorks Castleford
GODBER, William Son M 0 (2 MONTH) 1911 Yorks Castleford
BAKER, George Charles Nephew Single M 19 1892 Surface Man Colliery Yorks Castleford
BAKER, Samuel Nephew Single M 16 1895 Underground Pony Driver Yorks Castleford
BAKER, William Nephew M 10 1901 Yorks Castleford
I would guess that Elizabeth Rebecca Jane Godber was the sister of Mary Ann Baker given they were born in the same town. No sign of wither John Baker or Mary Ann Baker.
Mark