Why was Margaret Kemble gauge spying?

Answer 1

There is no factual evidence that Margaret divulged General Gage's military secrets to the colonists. While the General was supposedly quoted as saying only 2 people knew about his plans for marching on Lexington/Concord, there could easily have been others who knew or surmised his plans, particularly given the scrutiny all military movements were under at the time.

In Margaret's defense, there is significant evidence that she was loyal to her husband and that General Gage never treated her as being responsible for losing his military command. General Gage would never have let such a betrayal go unpunished, much less spend 11 years pretending it never happened. Despite later claims that the General never spoke to Margaret after shipping her back to England, their marriage continued until his death 11 years later, with no signs of estrangement. They had another child a year later, they lived together in London, they traveled together to visit his family in Sussex, and Margaret was a major beneficiary of the General's will.

Finally, Margaret lived 37 years after her husband's death but she never returned to America to visit her birthplace or family. She undoubtedly had sympathy for the American cause, but she chose to spend the remainder of her life as an Englishwoman.