Prosecutors are seeking 45 years for the suspect, known as Javier G D, with the trial beginning on Thursday.
The alleged repeated rapes took place at the family home in Baix Llobregat, near Barcelona, and shockingly, the mother is being tried as an accomplice.
Lawyers are seeking a nine-year sentence after she would allegedly ask the girls ‘how it had been’ after they were raped.
The alleged rapist said he was part of the ‘Order of Odin’, which said he had to rape the teenagers or else their relatives would be cursed.
The trial will begin in Barcelona on Thursday.