Is it permissible for a man to remain married to a woman who was breastfed by his stepmother for 40 days, knowing that the man was not breastfed naturally by his mother and has a daughter?

If a woman suckles from her husband's father's wife, she becomes his milk-sister, because the father is the owner of the milk, and the milk of the male progenitor renders marriage unlawful. Therefore, the marriage is invalid and must be annulled, and the child is attributed to him due to the doubt (shubha).