HRS §707-741
When sexual contact between close relatives is a crime
This law makes it a crime to have sex with a close relative, such as a parent, child, sibling, or in-law, where marriage is not allowed. It is a serious crime called incest, and it is a class C felony.
everyone
The statute, as written — Incest
(1) A person commits the offense of incest if the person commits an act of sexual penetration with another who is within the degrees of consanguinity or affinity within which marriage is prohibited. (2) Incest is a class C felony.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.