Is it permissible for a man to marry a girl if she and her elder sister were breastfed together?

Marriage is prohibited by fosterage if the man suckled from the girl's mother, or from her father's wife through "fahl milk" (milk belonging to the husband). However, she is not forbidden to him if he did not suckle from the milk of her mother or father, nor did he suckle with her from another woman. The fosterage that prohibits marriage consists of five satisfying sucklings.