We do know he is living with his mother and daughter (Granddaughter of his mother) 2 Apr 1911 Census: "
15 George Street, Leeds, Yorkshire, United Kingdom
Caroline Flarty nee Espin nee Bennet 63 married 8 years 4 children (Widow) Head
William Bennet Espin 37 married 20yrs 6 children 4 alive (Cloth Fettler)
Caroline Espin 20 (Cloth Minder?) Grandaughter
http://goo.gl/Mx9MZxHis wife Ada nee Yardley in 2 Apr 1911 is living at:
18 Ridge Road, Leeds, Yorkshire, England
Ada Espin 38 married 19yrs 6 children 4 alive (Office Cleaning in Insurance offices) Head
John Espin 18 (Mechanic)
Mary Elsie Espin 15 (piece??? Cloth Mill)
Catherine Espin 13
http://goo.gl/KY0WfpAda marries Charles Edward Holderness Jan-Mar 1922 & dies Oct-Dec 1947
Back 10 years 31 Mar 1901 Census they are living at same address:
5 Crown Street, Leeds, Yorkshire, United Kingdom
William B Espin 28 (Fettler) married to
Ada Espin 28 with 3 children:
Eliza Espin 6,
Catherine Espin 3,
William Espin 1
William Bennett & Ada Yardley were married 25 Apr 1891 both living at 19 Lisbon Street, Leeds, William occupation: Packer, his mother Caroline Flaherty nee Bennett and brother Charles Espin 1869 – 1930 both Present.
http://goo.gl/nBeOhLSo of the 4 children left alive in 1911, Caroline is living with William B & grandmother while the other 3 are living with Ada
Perhaps there was a divorce, though he is RC. and he remarried as you suggested.
M.