The man was found guilty of eight charges, including two counts of rape and four counts of serious indecent assault.
His wife has been found guilty of five offences, including three of serious indecent assault, and one count of abetting rape.
Kaniva News reports the case was heard before Judge Niu in Vava’u.
The offences occurred on January 11 this year after the complainant and several other people, including the husband and wife, had engaged in a lengthy drinking session which, began the previous night.