"I wanted them to stop lying," she testified, referring to the magazine. "I was worried about all the lies they were telling about the family."
"Was it a lie to say your son had a problem with prescription drugs?" Putnam asked.
"He did not have a problem," she insisted.
Putnam later asked Jackson's mother if she liked to "shut your ears to bad things."
"I don't like to hear bad news," she said.
Jackson appeared combative at times when Putnam cross-examined her, punching back at his questions.
"What does this have to do with my son dying?" she replied at one point.
"I think she was badgered, but that wasn't the first time," Panish told reporters later. "In her deposition, she was asked questions like, "Does your husband ever beat you?'"
For the pretrial deposition, she was questioned for about 12 hours over three days.
Putnam denied he was being overly aggressive in his questioning of her.
"I just wanted to know the facts from her and there was no reason to be aggressive with her," he said. "She was combative, but you can't blame Mrs. Jackson for that. None of us want to find ourselves in a situation where we're having to confront the very public death of our child."
Putnam refused to discuss why he asked Katherine Jackson in the deposition if her husband, Joe Jackson, ever beat her.
"What occurred in those depositions was confidential at Mrs. Jackson's request, therefore I am not at liberty to go into to the private matters that we went into in that deposition," Putnam told CNN. However, Katherine Jackson and her lawyer both brought up the question in court Monday.
"I am not going to go into what we went into about the very tragic history Michael Jackson had with his parents and father over the period of his life," Putnam said. "That is something we did not go into on the stand because it is not relevant. I'm not bringing that up."
AEG Live executive John Meglen is on the witness stand Tuesday as the company's defense presentation begins. Testimony is expected to last into September, the judge told the jury.