More explosive testimony is emerging from the courtroom in Blac Chyna’s trial against the Kardashians.

While taking the stand in Los Angeles on Thursday, Kris Jenner claimed that both Kylie Jenner and her then-boyfriend Tyga told her that Rob Kardashian’s ex once threatened to kill her youngest daughter.

Jenner testified that she was “alarmed” when Kylie informed her about the alleged threat years ago.

According to Page Six, Kris also said that Tyga told her on several occasions that Chyna allegedly tried to physically attack him with a knife.

“Of course it was alarming but we just kept it in the family,” said Kris, who did not report the alleged incident to police.

Chyna dated Tyga from 2011 to 2014. They share a 9-year-old son, King. Tyga went on to date Kylie on and off from 2014 to 2017, while Chyna’s relationship with Rob began in 2016. The two have a 5-year-old daughter, Dream.

During her testimony on Wednesday, Chyna claimed she was still in a relationship with Tyga when he started dating Kylie in 2014.

Kris was asked if she was concerned about her son having a relationship with the same woman who allegedly threatened Kylie. “I didn’t have much of a reaction,” Kris said. “There was just a lot of drama … and I’m used to that in my family.”

Despite Chyna’s questionable past, Kris said she still supported Rob’s engagement to Chyna. “It wasn’t that I was not concerned. They had a rocky relationship from the start,” she said. “But I love second chances and I wanted them to win. I just wanted my son to be happy.”

Jenner also testified that she thought Chyna was going to kill Rob when she allegedly pointed a gun to his head in December 2016. Chyna’s lawyer asked if she believed Chyna attempted to murder her son, to which Kris responded, “I do.” Chyna told the court that she was just joking around and didn’t intend to harm him.

Back in October 2017, Chyna filed a lawsuit against the Kardashian-Jenner family for defamation and contract interference, alleging that Kris and her daughters, Kim, Khloé, and Kylie, “conspired” to get the second season of her E! reality series “Rob & Chyna” canceled. She claims the famous family used their power to tarnish her reputation and prevent financial opportunities, which they’ve denied.