Noted events in her life were:
• Reseach... some say this is Mary ALLEN
Unknown married Thomas (d. 1734) GIBSON, son of probably Gibson (or Hubbard) GIBSON and Unknown. (Thomas (d. 1734) GIBSON was born about 1691 and died before 7 Nov 1734 in Hanover County, VA.)
There's a big gap (25 years) between the marriage date and first child. Perhaps there is another Thomas Gibson in between??