The Magistrate's Court office said on Tuesday that the two accused, who are yet to be named, were charged together with the former ministers.
The two and 'Akosita Lavulavu will next appear in court on Friday.
Matangi Tonga reported that 'Etuate Lavulavu's case is adjourned until 3 December.
The Lavulavu couple is charged with knowingly dealing with forged documents and obtaining credit by false pretences, after irregularities in an audit of the 'Unuaki 'o Tonga Royal Institute in 2016.