Mich. Comp. Laws § 551.4: Incapacity; persons woman prohibited from marrying.

Sec. 4.

A woman shall not marry her father, brother, grandfather, son, grandson, stepfather, grandmother's husband, daughter's husband, granddaughter's husband, husband's father, husband's grandfather, husband's son, husband's grandson, brother's son, sister's son, father's brother, mother's brother, or cousin of the first degree, or another woman.