The wife identified on Joseph's profile, Margaret Ann Sheather was supposedly the daughter of John and Susanna _______ Sheather (according to Margaret's profile). She is shown with a birth year of 1637, in Stratford. However, according to Torrey, John and Susanna ______ married in 1651 in Guilford, CT.
The NEHGR states that John Sheather came to Guilford, CT about 1650, and shows the first child of John and Susanna Sheather as being born in 1651; none of the girls are named Margaret. One is Hannah, but she was born probably after 1660, and married Thomas Hull (NEHGR 59:45). I have not found any other John Sheather's being in Connecticut any earlier, thus making it doubtful that "Margaret" is John and Susanna's daughter, and more doubtful that she is Joseph's wife.
No records have been found of any Sheather/Shether being born in Connecticut before 1651.
The only "sources" of information about Margaret Ann Sheather being the daughter of John Sheather, and wife of Joseph Wilcoxson are the Pedigree Research File, International Genealogical Institute, and the Ancestral file, none of which are considered good sources of information.
As such, it appears Margaret Ann Sheather was neither the daughter of John, nor the wife of Joseph Wilcoxson.