568.020. Incest — penalty.
1. A person commits the offense of incest if he or she marries or purports to marry or engages in sexual intercourse or deviate sexual intercourse with a person he or she knows to be, without regard to legitimacy, his or her:
- Ancestor or descendant by blood or adoption; or
- Stepchild, while the marriage creating that relationship exists; or
- Brother or sister of the whole or half-blood; or
- Uncle, aunt, nephew or niece of the whole blood.
2. The offense of incest is a class E felony.
3. The court shall not grant probation to a person who has previously been found guilty of an offense under this section.