Modisane died on New Year's Eve at a B&B the couple had been visiting in Yeoville, Johannesburg.
Ngcobo's lawyer Meshack Maluleke said it was possible that Modisane sustained her bruises days before she died. Du Plessis disagreed, noting that the pathologist was clear in his findings of how Modisane died.
"The pathologist said she died of blunt force injury. What you are now doing is expressing a medical opinion," said Du Plessis.
He added that the pathologist would also explain if the blood on a sanitary pad found on the scene was the deceased menstrual blood or if the blood came from Modisane's injuries. The case was postponed to February 21.