Peter Stephens, husband of Anna Maria Chrisman, died 1757, not 1812, and thus can't be the father of Lavinia Winters, as Lavina was born 1760 or 1770.
https://babel.hathitrust.org/cgi/pt?id=wu.89066286774&view=1up&...
The Stephens family, with collateral branches / by Edward Stephens Clark
pg 1
THE AMERICAN GENEALOGICAL RECORD VOL I
Peter Stephens died in Stephensburgh (now Stephens City), Va, in Nov 1757.
A history of the valley of Virginia / by Samuel Kercheval is very similar to the above.
https://web.archive.org/web/20131111040833/http://newtownhistorycen...
Stephens City was chartered in 1758 as the town of “Stephensburgh,” but its origins reach back into the early 1730s when Peter Stephens (1687-1757), an immigrant originally from Heidelberg, Germany, built his homestead on land that would eventually become part of the far southern end of the original town.
https://en.wikipedia.org/wiki/Peter_Stephens_(pioneer)
Peter Stephens (March 3, 1687 – December 6, 1757) was the son of Gabriel Steffen and of Barbara (née Bar). Stephens is known for founding present-day Stephens City, Virginia.
The 1812 date of death seems to have come from Findagrave which is cited on FamilySearch and elsewhere. https://www.familysearch.org/tree/person/details/GMGC-RB2 has an image of a headstone for a Peter Stephens where the date of death can be read either 1812 or 1819. The inscription states that Peter Stephens of that headstone was aged 60 yr 8 mo. His date of birth if he died in 1819, would be 1759, That man could not be father of Lavina, nor the husband of Anna Maria Chrisman.
Anyway, Peter Stephens and his wife Anna Maria Chrisman, can't be the parents of Lavinia Winters as he died before she was born. Unless the Peter who died in 1757 is a different man, she should be removed as their child.