I really enjoyed the Bostwick series, as well, but I remember being very much put off by the implication portrayed therein that he was carrying on with a woman other than Martha.
Well, I think the issue was whether Washington was “carrying on” with Sally Fairfax, who was a married woman at the time. Washington’s friendship with Fairfax predated his courtship of Martha. Without a doubt, Washington and Fairfax were good friends, and there’s nothing wrong with that. Were they more than good friends? Who knows. But Fairfax and her family returned to England, and that was the end of that. I thought the TV series presented the friendship well. It was the promoters of the series that tried to make a scandal of it for the purpose of ratings.
No one would seriously suggest that Washington was not faithful to Martha once the courtship began.