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GREELEY, Colo. — Christopher Watts, the Frederick man accused of killing his wife and young daughters, pleaded guilty to murder on Tuesday in a deal that will avoid the death penalty.

The plea in a Weld County courtroom includes the unlawful termination of pregnancy for the death of his unborn son, Nico.

Watts said in court he is satisfied with his defense representation and is knowingly accepting this plead deal.

He entered his plea Tuesday during a court hearing, replying “guilty” nine times in response to Judge Marcelo Kopcow’s reading of each charge against him in the deaths of Shanann Watts, 34, and their children, Bella, 4, and Celeste, 3.

Watts’ voice was shaking, and he could occasionally be heard sniffing after each time he said “guilty.” Her parents, Frank Rzucek and Sandra Onorati Rzucek, and her brother, Frankie Rzucek, watched from a front row of the packed courtroom.

The agreement also required Watts to plead guilty to unlawful termination of Shanann Watts’ pregnancy, a felony in Colorado. Family members have said she planned to name the boy Nico.

The deal also ensures that Watts, who is 33, will consecutively serve each sentence for that charge and the murders of his wife and daughters.

“He deserves a life sentence for each and every act,” Weld County District Attorney Michael Rourke said.

Rourke said he and another prosecutor visited Shanann Watts’ family in North Carolina last month to discuss the odds of a death penalty sentence being carried out.

Rourke said he described “extraordinary delays” in carrying out the death penalty in Colorado since Gov. John Hickenlooper’s 2013 decision to block the execution of Nathan Dunlap. Hickenlooper also expressed doubts at the time about the use of the death penalty generally.

Shanann Watts’ family members “were very strongly in favor of a resolution in this case short of the death penalty,” Rourke said. He recalled her mother, Sandra, saying Christopher Watts “made the choice” to take the lives of his family members.

“I do not want to be in the position of making the choice to take his,” Rourke said, quoting Sandra. “That’s about as firmly as she could have said it to me.”

The Rzucek family watched from a row of chairs, holding hands, as Rourke spoke to reporters but did not speak. Rourke said they may decide to testify when Christopher Watts is formally sentenced on Nov. 19.

Watts is represented by the Office of the Colorado State Public Defender, which does not comment on pending cases.

Watts, a former oil and gas worker, was charged in August with killing his pregnant wife and their daughters inside their home in Frederick, a community in the oil and gas fields north of Denver. Police have said Watts then drove their bodies to an oil site owned by his former employer.

The girls’ bodies were found submerged in an oil tank, and Shanann Watts’ body was found in a shallow grave.

Investigators claimed in the documents that Watts admitted to police that he killed his wife. But he told police that he strangled her in “a rage” when he discovered she had strangled their two daughters after he sought a separation.

Rourke said Tuesday that investigators never believed that Watts was being entirely truthful.

“The spotlight that he tried to shine on Shanann — falsely, incorrectly and frankly a flat-out lie — has been corrected,” Rourke said. “The spotlight shines directly where it belongs: On him.”

He pleaded guilty to a total of nine counts for the murders of his wife, two daughters and unborn son less than three months after the crime took place. This happened very quickly by most legal standards.

The judge set sentencing for Nov. 19 at 10 a.m. He will be sentenced to life in prison without parole.

RELATED: Full coverage of the deaths of Shannan Watts and her daughters