OK, I now have the extra info from the parish register:
8 May 1881 John George Small (bachelor, painter), age 26, of Murton Colliery, son of John Small (moulder), married Ann Usher (widow), age 28, of Murton Colliery, daughter of Charles Williams (fisherman), at the parish church of Dalton-le-Dale
Witnesses: Richard Emery, Ann Woodcock [Ann's brother-in-law and aunt]
The 1881 entry Gracie mentioned is promising given the "printer" occupation (thanks again for that!). Obviously the first names of the chap are different, but perhaps "John George" weren't his actual first names.
That Joseph William may be the son of a John Small who was a baths lessee in Gateshead and later Cullercoats, as opposed to a moulder. [Edit] Ah, it seems the father John Small was an iron moulder in Sunderland in 1851, so perhaps he was a moulder and baths lessee at the same time. Everything seems to point to John George actually being Joseph William...
Not much further forward with finding Ann and her new husband after 1881, even with the new info, but look forward to any new ideas.