In 1861 census, Mary is married to a James Perry, aged 35 of Barking. I can only presume her previous marriage had been to a Sutton. as she has five children with the Sutton surname from ages 3 to 18.; plus a new Perry sprog of 9 months
Mary married Unknown Sutton.
Mary next married James Perry. (James Perry was born in 1826 in Barking.)