Idaho Statutes Title 18. Crimes and Punishments § 18-6601. Incest

(1) Any person who willfully marries or engages in sexual intercourse with another person known to be within the degrees of consanguinity within which marriages are declared by law to be incestuous and void under section 32-205, Idaho Code, is guilty of a felony.

(2) For the purposes of this section, “sexual intercourse” means genital-genital, oral-genital, anal-genital, oral-anal, manual-anal, or manual-genital penetration between persons of the same or opposite sex.

(3) Any violations of this section are punishable by imprisonment in the state prison for a term not to exceed fifteen (15) years; however, if a victim is under the age of eighteen (18) years at the time of violation of this section, such violation is punishable by imprisonment in the state prison for a term not to exceed life.