The Juice

A woman baby-sitting her two young nieces went berserk and stabbed them repeatedly in a bloody rampage in her sister and brother-in-law’s showcase Westchester home across the street from Martha Stewart’s farm, authorities said yesterday. Lisa Turkki, 39, grabbed a knife from the kitchen of the Katonah home and stabbed Maeve and Annabel Kelly, ages 7 and 9, at around 9 p.m. Saturday, seriously wounding both youngsters, said police in Bedford, the town that encompasses Katonah.

A 911 call was placed at 9:22 p.m., apparently by Turkki, pleading for help. The girls’ parent — financier Joe Kelly, 50, and Eva, 43, — were in nearby Caramoor attending a concert. They were called to the box office at intermission and told to return home. Neighbors heard screams from the parents as they entered the blood-spattered kitchen where the mayhem unfolded. “This is a parent’s worst nightmare,” said Heather Flournoy, who once wrote on her blog, Katonah Green, about the family and their innovative “green” home.

Turkki was arrested in the front yard on assault charges. Her nieces were in stable condition at Westchester Medical Center and were expected to survive