Mich. Comp. Laws § 551.3: Incapacity; persons man prohibited from marrying.

Sec. 3.

A man shall not marry his mother, sister, grandmother, daughter, granddaughter, stepmother, grandfather's wife, son's wife, grandson's wife, wife's mother, wife's grandmother, wife's daughter, wife's granddaughter, brother's daughter, sister's daughter, father's sister, mother's sister, or cousin of the first degree, or another man.