This Joyce has the same name as her husband Thomas' mother and is born the same year - 1720. Thomas, the husband, wasn't born until 1747. It's very unlikely he married a woman 27 years older than he was and had a family with her. Additionally, her maiden name probably wasn't Garnett because her parents have the surname Pitts. I posted under Thomas' profile over a year ago about the problems with this marriage and no one has addressed it, so I'm going ahead and disconnecting this Joyce from him as his wife. If someone can document that he married a woman 27 years younger, she can always be reconnected.
