South Carolina Code 16-15-20. Incest
(1) A man with his mother, grandmother, daughter, granddaughter, stepmother, sister, 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 or mother’s sister; or
(2) A woman with her father, grandfather, son, grandson, stepfather, brother, 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 or mother’s brother;
Shall be guilty of incest and shall be punished by a fine of not less than five hundred dollars or imprisonment not less than one year in the Penitentiary, or both such fine and imprisonment.