Is a woman who shares the same foster mother as my foster sister considered my foster sister?

If the mother who breastfed you also breastfed that woman, then she is your sister through suckling, for the Prophet, peace and blessings be upon him, said: "What is unlawful by lineage is unlawful by suckling." However, if this foster mother did not breastfeed that woman, then she is not your sister through suckling.