Asim al-Ahwal عاصم الأحول · The Book of Marriage

It was narrated from Ibn 'Abbas that a man came to the Messenger of Allah and said: "I have a wife who is one of the most beloved of the people to me, but she does not object if anyone touches her." He said: "Divorce her." He said: "I cannot do without her." He said: "Then stay with her as much as you need to."

a woman and her paternal aunt or a woman and her maternal aunt.

"A woman should not be taken as a co-wife to her paternal aunt or her maternal aunt."