Ellis sons want justice no matter the cost

Jon and Peter Ellis want justice for the murder of their father Bob, even if it means their mother will be executed.

Noor Ellis is facing charges carrying the death penalty in Bali after allegedly paying her maid's boyfriend to kill Mr Ellis, 60, whose body was found in an Indonesian rice field in October 2014.

The Australian businessman's sons said if the allegations were true, their mother would have to face the consequences.

"We just want justice served, whatever that means," Peter told the Seven Network's Sunday Night program.

Police allege Ms Ellis paid a man known as Aril, the boyfriend of her maid known as "F", $A14,000 to kill Mr Ellis.

They further allege Aril and four others slashed Mr Ellis' throat in the kitchen of his villa while his wife was in another room.

Mr Ellis' body was found wrapped in plastic and bedding, dumped in a watery ditch running alongside a rice field.