I can see a marriage in Guildford district in Jan-March 1851 (Vol 4, p171) between a Susannah Quinnell and Lewis Tyrrell
this looks like them on the 1851 census, in Ockham, Surrey [Guildford district again] - Susan looks like she may fit your details.
Lewis Turrell 27 - b Horsley, Surrey
Susan Turrell 27 - b Kirdford, Sussex
John Turrell 4 Mo b Ockham
Reference HO107, 1594, 234, 24
I haven't fuond Susan on 1841, or her or John after 1851, except for a possible death in 1880 in Croydon (aged 58 ie born c1822) . I have found Lewis alone, saying he is married. There is a probate register entry for the Susannah who dies in 1880, with legatees Rebecca Rosetta Quinell and John Quinell (minors) and Arthur and Caroline Mary Eleanor Quinell, infants - care of their mother and guardian Mary Eleanor Quinnell, widow of Station Rd Crawley. Estate was under £100