Shepard Prettyman 1787-1853 m/Eunice Steel of DE

I am trying to discover who the parents were of Eunice Steel.
She was born abt 1790 and married Shepard between 1808-1816 in Sussex County, Delaware. Shepard made his will on 2/28/1846.It was probated on 2/4/1853.He named sons William and Isaac; daughter, Lydia Milby, wife of John Carey.William received all of the real estate. Eunice was not mentioned in the will so I am presuming that she passed away prior to 2/28/1846.

I know that they had 3 children:
Isaac Prettyman b. abt 1817 Sussex County, De & d. abt 1855.
He was married to Mary J. Carey and they had 3 daus. & 2 sons.
Lydia Milby Prettyman was b. abt 1819 and d. bet. 1870 - 1879. She was married to John Carey and they had 2 children, John P. & Sarah.
William Henry Prettyman b.11/6/1821 De and d. 3/3/1899 Broadkill Hundred, Sussex Co. De. He married Naama Murray Bennum on 11/12/1845 in Sussex County. They had 2 daus and 2 sons.

Any help would be greatly appreciated for any of those mentioned.