What is the ruling on marrying the wife's paternal cousin or maternal cousin, while the wife remains married?

It is permissible to combine a wife with her paternal uncle's daughter, or her paternal aunt, or her maternal uncle, or her maternal aunt, because the Sacred Law did not prohibit that. Rather, it only prohibited combining two sisters, or a woman and her paternal aunt or maternal aunt. The rule regarding the prohibition of combining is that if two women were such that, if one of them were a man, it would not be permissible for him to marry the other, then it is not permissible for him to combine them.