The estranged husband of a woman charged with first-degree murder in the death of Jagtar Gill told an Ottawa court Thursday his wife tried to stab him on four different occasions.

Jason Ronald testified that 37-year-old Gurpreet Ronald allegedly threatened him with a knife during arguments over money, his infidelity, and their planned separation.

"She had the knife up over her right shoulder, much like in the movie Psycho," Jason Ronald said, mimicking a stabbing motion for the jury as he gave his testimony.

Gurpreet Ronald and 41-year-old Bhupinderpal Gill, Jagtar Gill's husband, have both pleaded not guilty of first-degree murder in the death of the 43-year-old mother of three.

The two OC Transpo drivers and alleged lovers were arrested after Jagtar Gill's stabbed and bludgeoned body was found in her Barrhaven home on Jan. 29, 2014 — a date that would have been her and Bhupinderpal's 17th wedding anniversary.

The pair are being tried together but have separate defence teams.

Separated, waiting for divorce

Court heard Thursday that the Ronalds have been married since 2001 and have two young daughters. Jason Ronald, however, testified that he was now separated from his wife and was awaiting a divorce.

Jagtar Gill, 43, was found dead in her home on Jan. 29, 2014. (Gill family)

Speaking quickly and admitting he was "nervous," Ronald explained to the court the nature of his wife's alleged attacks.

In one instance, he testified, Gurpreet Ronald allegedly came at him swinging "an eight-inch-long kitchen knife, with a thick blade about three-to-four-inches thick" after they'd had a long argument in the kitchen of their Fitzroy Harbour home.

It was that alleged attack, Jason Ronald said, that reminded him of the iconic scene from Alfred Hitchcock's classic film.

The 5-10, 165-pound Ronald said he restrained his wife and shook her forearm until she dropped the knife. He said he told her the fight was "ridiculous" and that "the two girls are trying to sleep."

After he put down his head, his wife "started punching me with her free arm," he testified.

'You've been doing what you want for years'

There were three other alleged attacks that happened in an "eerily similar fashion," Jason Ronald told court. In one argument, he said, Gurpreet Ronald menacingly held up a knife — but dropped it when their daughter, sitting on the stairs nearby, asked what she was doing.

The final incident, Jason Ronald said, came in the fall of 2013, when his wife allegedly lunged at him with a knife during a heated argument about his affair and the financial costs of separating.

Bhupinderpal Gill and Gurpreet Ronald have both been charged with first-degree murder in the death of Jagtar Gill. (CBC)

During the fracas, Ronald testified, he said to his wife, "You've been doing what you want for years, so why should you care."

Earlier this week, Bhupinderpal Gill told court that he and Gurpreet Ronald were also having an affair — one that he broke off in the fall of 2013.

Gurpreet Ronald has not taken the stand, but during a police interview she gave the day after Jagtar Gill's body was found, she told an Ottawa detective that she and Gill were nothing more than friends and coworkers.

The Crown has alleged that Gurpreet Ronald threw a large kitchen knife and a pair of bloody blue latex-like gloves into a wooded area near an Ottawa path in April 2014.

DNA tests later revealed the blood on the knife belonged to both Gurpreet Ronald and Jagtar Gill.

The trial continues.