Is a girl breastfed by the first wife considered a sister to the children of the second wife?

The girl who is breastfed a Shar'i (Islamically recognized) suckling by a woman becomes a sister to all the children of that woman, whether they are from her first husband or another, just as she becomes a sister to all the children of the man from whose cohabitation the milk resulted, and to everyone who was suckled from any milk produced from his cohabitation. For the man is considered a father to the girl through suckling, and all his children are her siblings through suckling.