Ok, if I have this right they Married 1796 in Durham;
Children;
Samuel Lucas 22 July 1802
Sarah Ann 19 Sept 1804, Buried 6 Dec 1806 age 2
Elizabeth 18 May 1807, Buried 20 March 1808, Infant
All above Great Yarmouth
James Edward 11 Sept 1814 Gorleston, Suffolk (F/S.Org)
Charlotte Phoebe 29 July 1817 Great Yarmouth
Samuel PRETTYMAN was Buried 1 Aug 1837, St Nicholas, GY, age 64 (birth c 1773)
(FreeREG)
There is a SARAH Prettyman was Buried 26 Dec 1852 same Church age 78
(FreeREG)
(1841 she is a Nurse born c 1776 , 1851 a Pauper, Widow, age 77 (1774), born Caistor)
Maybe yours?