Do the children of two sisters who were suckled by the same mother become brothers by suckling, whether they are adults or infants, or is that limited only to those who were suckled?

If a child nurses from a woman, the children of the nursing mother, both male and female, become siblings to him. The same applies to the children of the nursing mother's husband, who was the cause of the milk. However, those among the children of the nursing mother's sister who did not nurse are not included in this ruling. For example, if one of Fatimah's sons nurses from her sister Salma, he becomes a brother to Salma's children and to her husband's children. The converse is also true. However, one who did not nurse from his maternal aunt is not considered a brother to his maternal aunt's children who did not nurse from his mother.