There is an 1841 census record at Kingerby as follows:
John TOYN b 1774 Lincs Ag Lab
wife Sarah b 1774 Lincs
Susanna b 1811 Lincs F Serv
William 1816 Lincs MServ
Mary 1830 Lincs F Serv
+ 2 ag labs Smith & Prescott
Also 1851, 1871 and 1881 census show her as b Kingerby (Saxby on 1871) but again very close by.
I found a ma for Sarah Borringham and John Tims or Toin on 22/1/1797 at Faldingworth (nr Middle Rasen Lincs)
I also found a bu for John Toyn 1864 Caistor Reg Dist
also Sarah Toyn bu 1847 (aged 73) Kingerby Sarah was bp 1774 at Sotby Lincs, fa John, mo Elizabeth
All the above places are quite close to each other, near Market Rasen.
Whilst searching it was obvious there are lots of Toyne(s) in this area (Caistor Lincs) and several spellings eg Tim, Tims,Tawn. Toon, Toyn, Toyne and Toin so need to check all variants.
Unfortunatley I didnt find Susanna's actual bp record but I think it is safe to assume she was born Kingerby as the family seem to have lived and died in this area.
Hope this all helps - good luck.