User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-24205801-20121118053718/@comment-1515612-20121121003732

Okay maybe you missed something

List of PJO "COUSINS" dating each other:

Percy/Annabeth

Piper/Jason

Silena/Beckendorf

Jason/Reyna

Clarisse/Chris

Hazel/Frank

They are ALL COUSINS.