Section 11, The Sexual Offences Act, 2012

(1) A female person who engages in or attempts to engagein sexual intercourse with a male person whom she knows to be her brother, half-brother, nephew, father, son or grandfather commits the offence of incest by a woman and is liable on conviction to imprisonment for a term not not less than five years and not exceeding fifteen years. (2) A person commits an offence under subsection (1) notwithstanding that the relation between her and the other person is not traced through lawful wedlock.