I have not followed Abigail's line, so the only info I have for her is from The Genealogy of the Olmsted Family in America on page 397. Her birthdate is given as 24 Mar 1731.
The Brookfield Vital Records:168 gives her parents as Jabish (Jabez) and Thankful Omsted.
Jeremiah and Elizabeth Litten were married 6 Jan 1734 at Brookfield. An Abigail is not listed among their children.
Their first born was Jabez, who was born 29 Jul 1735.