I cannot find her in subsequent census records as either Kate Parker or Kate Baker. After George died in 1891, I thought perhaps she returned to her family, but my great-grand father was in the Dartmouth Union Workhouse in 1901, so she's not in that census. At that time (he died there in 1905), he was married to his second wife, so it's doubtful Kate would move in with her.
I have looked for a second marriage under Parker/Baker, but nothing. I even checked to see if she migrated to Australia where others in the family moved, but again, nothing.