The nanny who allegedly slaughtered two Upper West Side children in her care woke up yesterday — and asked about her own family, sources told The Post. 
 
 Yoselyn Ortega — who a source said suffered a broken vertebrae in a failed suicide bid after she allegedly butchered 6-year-old Lucia and 2-year-old Leo Krim — had been unable to speak since Thursday’s rampage. 
 
 She has since undergone surgery and is “talking a little,” according to a source. 
 
 Investigators returned yesterday to Ortega’s New York Hospital bedside in a bid to learn what sparked the horrific slayings of the Krim siblings, sources said. 
 
 Ortega, 50, has lawyered up and won’t answer questions, said one source. She did speak to her doctor and “asked about her family,” the source said. 
 
 NYPD spokesman Paul Browne said Ortega remained intubated yesterday. 
 
 Ortega shares a Harlem apartment with her sister, her niece and Ortega’s 17-year-old son, Jesus, who recently moved from their native Dominican Republic and attends a Bronx high school. 
 
 A search warrant executed on the nanny’s apartment turned up no clues of a motive in the slayings, according to another source. 
 
 The children’s grieving parents, CNBC exec Kevin Krim and wife Marina Linsley Krim, yesterday remained in seclusion with surviving daughter Nessie, 3 1/2. 
 
 The family left a Manhattan hotel early yesterday with friends, according to an employee. 
 
 Nessie had been with her mom at swimming lessons at the Jewish Community Center near the family’s West 75th Street apartment when the carnage took place. 
 
 Mom and daughter were happy and smiling as they left, a worker there recalled. They had planned to meet Ortega, with Lucia and Leo, for Lucia’s dance class at the nearby Kaufman dance studio at around 5 p.m. 
 
 But Ortega, who brought the kids home from school at around 3:30 that day, never showed up. 
 
 Marina Krim returned home shortly after 5:30 to find the nanny stabbing herself in the throat in an apparent suicide bid, and her two young children dead in the bathroom. 
 
 The tragedy has brought an outpouring of sympathy from strangers across the country, including one who posted an online message, “All the people are crying with you.” 
 
 Friends of the family also voiced their heartache and offered prayers and condolences on Facebook, where several relatives had posted tribute photos of the children. 
 
 In one poignant shot, Kevin’s sister Sarah walks hand in hand in New York with Lucia. 
 
 In another, aunt Katie Krim embraces her brother’s three beaming children alongside a caption that read: “The loves of my life, my angels.” 
 
 Additional reporting by Rebecca Rosenberg and Reuven Fenton ||||| The deranged nanny who allegedly butchered two adorable young children entrusted to her care was unraveling in recent months — suffering from mental, physical and financial issues, neighbors and police sources said yesterday. 
 
 Yoselyn Ortega, 50, appeared sick and gaunt, her Hamilton Heights neighbors said, and she appeared “nervous.” 
 
 “She lost a lot of weight. She looked very unhealthy. It looked like she was going through some problems,” said Ruben Diaz, 49. “She had aged a lot — like seven years in a few months.” 
 
 She also told people she was seeing a psychiatrist, cops said. 
 
 NEIGHBORS SHARE IN THE HORROR 
 
 NANNY ACCUSED OF STABBING TODDLERS TO DEATH 
 
 PHOTOS: REMEMBERING LEO AND LUCIA KRIM 
 
 “She snapped,” said Celia Ortega, the nanny’s sister. “We don’t understand what happened to her mind.” 
 
 Still, neighbors were shocked that she was suspected of stabbing to death little Lucia Krim, 6, and her baby brother Leo, 2, on Thursday before slashing her own wrists and throat in the kids’ West 75th Street apartment. 
 
 NYPD detectives were unable to interrogate her yesterday, as she remained in a medically induced coma at New York Hospital. 
 
 MOTHER’S BLOG SERVES AS HAUNTING TRIBUTE TO KIDS 
 
 READ BLOG EXCERPTS HERE 
 
 Law-enforcement sources said Ortega, a Dominican who has been a US citizen for 10 years, complained of money troubles, and her employers, Marina and Kevin Krim, had given her more hours of work. 
 
 They even hooked her up with a family they knew for a baby-sitting job on the side — but the family turned her down after an interview because she was, “a little too grumpy,” a law-enforcement source said. 
 
 But nobody could predict the horror she would allegedly inflict. 
 
 Marina Krim, 36, had taken daughter Nessie, 3, to a swimming lesson but returned to her tony prewar building shortly after 5:30 p.m. because the nanny never showed up with the two other children to meet them for Lucia’s dance class, a source said. 
 
 “She got a call from the nanny saying she’d picked them up from school and she was taking them straight home,” said an employee at the Upper West Side swim and dance facility. “She [Marina] didn’t seem nervous at all; she waved to me.” 
 
 A neighbor who likely was the last to see the children alive said Lucia seemed happy in the elevator only 30 minutes before the unspeakable crime. 
 
 “She [Lucia] looked so delightful,” said upstairs neighbor Charlotte Friedman. “I said, ‘What did you do?’ and she said, ‘Dancing.’ And that was it.” 
 
 Friedman described the girl as “happy, happy, happy.” 
 
 That all changed inside the apartment. Ortega used two kitchen knives in her alleged attack on the helpless children, sources said. Lucia suffered defensive wounds from bravely trying to fight her off. 
 
 She was stabbed multiple times in the stomach and neck, and Leo was stabbed twice in the neck, the sources said. 
 
 “They both suffered. They bled out,” said a source. “The little girl tried to protect herself.” 
 
 When their unsuspecting mom arrived home a short time later, she walked into the bathroom and found her babies lying in the tub fully clothed with stab wounds on their bodies. 
 
 Ortega slashed her own throat right in front of the horrified woman, said Police Commissioner Ray Kelly. 
 
 Marina was later seen in the mezzanine of the La Rochelle building, clutching her surviving middle child, Nessie. 
 
 “She was bent over the child, screaming and holding onto the only live child she still had,” said Friedman. “They were very deep, dark screams. 
 
 “She was screaming things like, ‘I’ll never speak to her again,’ repeating that over and over again. Then screaming things like, ‘It’s all right, you’ll be all right, you’ll be all right,’ ” said neighbor Rima Starr, 63. 
 
 “Then she would get waves of the reality of what just happened and then she’d go into just plain, bloodcurdling screams, with her arms flailing out to the sides. 
 
 “Then, in lucid moments, she’d say, ‘I need a doctor. I need a doctor.’ ” 
 
 Marina was rushed to St. Luke’s Hospital, and when cops arrived, the hysterical woman said, “What are we going to do now? I’ll never go back there again,” law-enforcement sources said. “They can have everything. I don’t want anything.” 
 
 Marina left the hospital and was holed up with Kevin, 37, and relatives at a luxury Manhattan hotel, sources said. 
 
 There was no clear motive yesterday, although Friedman, the neighbor, said Ortega was often aloof. 
 
 “The nanny just smiled — and nothing,” she said of the elevator encounter. “She was a colder type [than] most nannies I have encountered,” Friedman said. 
 
 Ortega’s tearful sister, Celia Ortega, of The Bronx, nannied for a girl in the same ballet class as the Krim girls and recommended her sister for a job with the Krim family. 
 
 Celia said she would tell Marina, “I’d give you my life,” if it would bring back the children. 
 
 Yoselyn Ortega was under guard at the hospital. A toxicology report came back negative for drugs, sources said. 
 
 Yoselyn’s son, a 17-year-old who attends the Bronx Catholic school Mount St. Michael Academy, is staying with another aunt. 
 
 The Krims’ extended family in California was still reeling from the news. 
 
 “Who would do that to innocent children?” said Karen Krim, Kevin’s mother. 
 
 “We’re exhausted,” said William Krim, Kevin’s father. “We’re all devastated here.” 
 
 Students and parents at PS 87 on West 78th Street — where Lucia was a first-grader — were shocked by the news, and all field trips had been canceled. 
 
 “People are very shaken obviously by what happened,” said Beth Servetar, whose son is in the fifth grade. 
 
 “I don’t think anybody really knew what to say to each other. There were watery eyes. The thing we did talk about was how horribly difficult it is to explain to our children what happened.” 
 
 Additional reporting by Laurel Babcock, Linda Massarella, Kirstan Conley, Reuven Fenton, Rebecca Rosenberg and Yoav Gonen
– The nanny who allegedly murdered two of the children in her care is awake and talking, the New York Post reports. Yoselyn Ortega already has a lawyer and won’t answer investigators’ questions about the deaths of Lucia Krim, 6, and brother Leo, 2, one source says. But she did ask about her family, the source adds. Investigators have searched her apartment, which she shares with her teenage son, sister, and niece, but found no hint of a motive. Toxicology tests found Ortega was not under the influence of narcotics or alcohol at the time. Ortega, who broke a vertebrae in her attempt to commit suicide, was still intubated yesterday. And as of yesterday, she had not been charged, since investigators had not been able to talk to her. “We wouldn’t charge a hospitalized suspect under these circumstances until an interview was conducted after consulting with doctors on the subject’s condition,” a police rep tells the AP. But investigators say they have much evidence, and there is very little doubt Ortega stabbed the two children. Click for more on the heartbreaking case.