Nanny pal tells of her sadness

THE UPPER West Side nanny on trial in the depraved stabbing deaths of two children in her care was possessed by a “demon,” her sister testified Monday.

Miladys Garcia, 64, took the stand on behalf of sibling Yoselyn Ortega, 55, who’s accused of stabbing Lulu Krim, 6, and her brother Leo, 2, in the bathroom of their parents’ W. 75th St. apartment on Oct. 25, 2012. Garcia said she spoke with Ortega just hours before the children were killed.

“The way I spoke to her, I know her voice,” she said on cross-examination. “It was like I was talking to a demon. She had become something evil.”