Krim Family Grandmother Says Crime Was "Horror Story"; Nanny Had 'Epic Argument' with Marina Krim Before Kids Murdered

More information is being released regarding the New York City nanny responsible for the killing of two children.

Yoselyn Ortega, the Dominican Republic nanny for the Krim family, was charged last week for the murder of Marina and Kevin Krim's 2-year-old son Leo and 6-year-old daughter Lucia.

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According to Radar Online, a source close to the case reported that Marina Krim and Ortega had an "epic argument" the day before the killing.

The source for Radar claims that Ortega reportedly said "when she left at the end of the day before the murders, Marina ignored her when she said good-bye and this made her very, very angry."

Mrs. Krim supposedly felt that Ortega wasn't taking care of the kids properly and feeding them too much junk food.

Kevin Krim's mother, Karen, commented, "It was just a horror story."

"I was their grandmother. It is really horrible," said Karen, who was interviewed on Wednesday at her Calif. home.

During questioning Ortega told police that she was angered the Krim family wanted her to do housework.

The Daily Mail reported the New York City police officials comments on Ortega's questioning saying, "She said something like, 'I'm paid to watch the children, not clean up and do housework.'"

Ortega had financial troubles that led to Mr. and Mrs. Krim offering extra money in exchange to do housework. The nanny did not take the offer kindly as the family planned on giving Ortega an additional five hours a week of work which got in the way of her medical appointments.

On Oct. 25, Marina Krim returned to her Upper West Side apartment in New York in the evening to find both of her children dead in the bathtub at the hands of her nanny bleeding nearby.

Police say they believe Ortega started cutting herself when Krim returned home.

"We believe now that the nanny began to stab herself as the woman entered the room," said Police Commissioner Ray Kelly on Friday. "We initially thought that had already been done but now information is coming out that she did it as the mother entered the bathroom."

Marina arrived at her Manhattan home with her three-year-old daughter Nessie who was with her at the time of the attack, according to the New York Post. The mom of three returned to her home after Ortega and the two children were missing from meeting Marina and Nessie at a nearby pool.

The father of the family, Kevin Krim, is a CNBC executive and was returning from a business trip in San Francisco at the time of the killings.