Fanny and her half - sister Mary disliked their stepmother and complained that she preferred her own children to them .
They were astonished that Godwin could replace Mary Wollstonecraft with her .
Mary Wollstonecraft and Mary Wollstonecraft 's half - sister Mary disliked their stepmother and complained that she preferred her own children to them .
They were astonished that Godwin could replace Mary Wollstonecraft with her .