Étain Óc ingen Echdach - Did she actually marry her father?

https://www.geni.com/people/Eochu-Airem-mac-Fionn-Rí-na-h-Éireann/6... MP
Gender: Male
Birth: estimated between 155BCE and 63
Ireland
Death: circa -170
Immediate Family:
Son of Finn mac Fionlogha, King in Ireland and Benia . ingen Crimthainn
Husband of Étain Óc ingen Echdach and
Étain Echraide ingen Ailella

https://www.geni.com/people/Étain-Óc-ingen-Echdach/6000000011802290...
Gender: Female
Birth: estimated between 215BCE and 155BCE
Immediate Family:
Daughter of Eochu Airem mac Fionn, Rí na h'Éireann and Étain Echraide ingen Ailella
Wife of Eochu Airem mac Fionn, Rí na h'Éireann
Mother of Mess Búachalla ingen Echach Ui Eremoin

https://www.geni.com/people/Étain-Óc-ingen-Echdach/6000000011802290865 MP
Gender: Female
Birth: estimated between 215BCE and 155BCE
Immediate Family:
Daughter of Eochu Airem mac Fionn, Rí na h'Éireann and Étain Echraide ingen Ailella
Wife of Eochu Airem mac Fionn, Rí na h'Éireann
Mother of Mess Búachalla ingen Echach Ui Eremoin