Surry was a servant in the household of Samuel Adams from about 1765 onward. She was given to Adams' second wife, Elizabeth Wells, as a wedding present (because nothing says you care like "Here! Have a human being!") However Adams was morally opposed to slavery and insisted that she be freed before she came to live with them. She was, and worked for the Adams family for nearly 50 years. Which would be so much less fun than working for the Addams Family.
(Incidentally, while Adams wouldn't own slaves himself, it wasn't something he fought particularly hard for during his political career. He did support anti-slavery measures in Massachusetts, but never forced the issue if it was going to cause friction between the states - getting along with other politicians was just so much more important.)
(I'm obviously talking about Samuel Adams, here - not Gomez)