A Colorado mom who is accused of stabbing her two young children to death and then fleeing the country after trying to frame her ex-husband finally arrived back in the US on Tuesday — almost two years after she was arrested in the UK.

Colorado District Attorney Michael Allen announced Kimberlee Singler’s return to the US during a somber press conference Tuesday afternoon. The 36-year-old faces two counts of first-degree murder and life behind bars if convicted.

“It’s a momentous day today,” Allen said, adding that her return “marks the first step in the criminal justice process.”

Singler is accused of killing her 9-year-old daughter and 7-year-old son and slashing her 11-year-old daughter amidst a bitter custody battle with her ex-husband on Dec. 18, 2023.

Her ex had recently been awarded more parenting time and his sister had been due to pick the three children up for the holidays two days before the slayings — but Singler refused to hand the kids over.

The husband’s lawyer then got a court order on Dec. 18, the day of the gruesome stabbings, for her to exchange the children two days later.

The mom called cops just after midnight on Dec. 19, claiming someone had burglarized the family’s Colorado Springs apartment. When police arrived, they said they found her two youngest children dead and her eldest injured.

Singler then told police that her ex-husband “had previously dreamt about killing his family” and that he was “always trying to ‘frame her’ and ‘get her arrested’ and to have the kids taken away from her,” Judge John Zani at Westminster Magistrates’ Court said in his January ruling when he rejected the challenge to her extradition to face murder charges.

A warrant was issued for her arrest mere days after the slaying, but she’d fled the country by then.

Singler’s extradition from the UK had repeatedly been stalled due to challenges ever since she was arrested in London on Dec. 30, 2023, less than two weeks after she allegedly killed her 9-year-old daughter and 7-year-old son.

She tried to argue that her extradition would violate the European human rights protections on the basis that a potential first-degree murder conviction would slap her with an automatic life-without-parole sentence, per Colorado law.

An eleventh-hour appeal was rejected in November, clearing her long-awaited extradition.

Allen, meanwhile, reiterated the importance of granting her eldest daughter, now 13, and her distraught family the privacy they desperately need.

The sole survivor previously recounted the moment her disturbed mother led her and her siblings to their bedrooms while muttering that “God was telling her to do it or their father was going to take them away.”

Singler faces seven first-degree charges for murder, attempted murder, and first-degree assault, Allen said.