Diane Goundar, 26, of Prestons, appeared before Parramatta Bail Court in Sydney and was denied bail after the prosecution pleaded that she was considered a flight risk.

According to police, the co-accused, husband Munesh Goundar, has fled to New Zealand.

The court was told that Diane and the victim, Rajnesh Singh, had a sexual affair which Munesh recently found out about.

It was alleged that on February 11, the Diane's husband ordered her to invite her former lover to their home.

The court was told that after Rajnesh arrived, she lured the victim to the upstairs master bedroom and her husband, who was hiding in a wardrobe with a kitchen knife, attacked him.

The husband then pushed the victim down the hallway and into the bathroom, where he stabbed him in the back. It is alleged he ordered his wife to close all the windows in the house and turn the radio on loud to mask the noise of the victim being murdered.

She watched as her husband allegedly stomped on her former lover's head and then dragged him, still alive and moaning in pain, to the bathtub, the 'Sun Herald' daily reported today.

She was asked to leave the house and when she returned she was told by her husband that her ex-lover is dead.

The husband and wife allegedly placed the dead body in the boot of his vehicle and drove to Heathcote, where the body was dumped. The husband fled the country last Wednesday.

A search of the couple's house revealed blood stains.