On the census we have;
John Street, St Peters, Wolverhampton
Thomas Lewis, Head 37. Grocer Porter B. Bridgnorth, Shropshire
Elizabeth Lewis, Wife 36. B. Letternahll, Staffordshire
Edith Hughes, Lodger 9. B: Pontesbury, Shropshire
Joseph Hughes, Lodger 6. B: Pontesbury, Shropshire
I have found their Father in the 1881 Census as Joseph Hughes, Blacksmith in Banbury, Oxfordshire but their mother Elizabeth Hughes (nee Edwards) I have been unable to trace any information since the birth of her son Joseph Clement Hughes in 1874. Joseph Clement went on to be an habitual criminal in which one newspaper article says he was neglected by his mother - so perhaps a clue as to why they were living there.
The Lewis's went on to house more lodgers in the 1891 census.
Thanks so much for helping!