Mum-of-two Sara Connor could spend more than four years in jail after all.

Australian woman Sara Connor is facing the potential of her four-year jail sentence being extended, as the prosecution prepares to appeal.

The mother-of-two was jailed for four years for her part in the death of a Bali police officer.

David Taylor, Connor’s British boyfriend, was jailed for six years over the killing of Wayan Sudarsa, whose body was found on Legian beach on August 7, 2016.

Taylor confessed to hitting Sudarsa, but argued that he acted in self-defence.

The court heard that Connor attempted to intervene in the fight, then destroyed Sudarsa’s identification and burnt her and Taylor’s bloodstained clothes in the hours after the attack.

The Byron Bay mum was found legally and convincingly guilty of group violence causing the death of Sudarsa.

Connor's lawyer, Erwin Siregar, told the ABC he had informed her family of the appeal and he will visit her in Kerobokan jail on Monday to urge the 46-year-old to also appeal.

He said if she did not, it would be a sign to the judges on the High Court bench that she accepted the sentence.

Speaking to Mamamia earlier this week, Professor Tim Lindsey, the Director of the Centre for Indonesian Law, Islam and Society at the Melbourne Law School, expected the prosecution to appeal, citing that this is a common action when sentences are less than two thirds of what the prosecution sought.

He also added Connor appealing could be the wrong decision.

"She’s looking down the barrel of a much harsher sentence," Professor Lindsey said. "It is very risky to appeal, if she appeals, she’s taking a huge risk."

With time already served and remissions of several months each year for good behaviour, Connor could be free in less than three years.

Read an explainer on why Sara Connor's sentence was more lenient than Schapelle Corby's here.