Two women were fatally shot on the Upper East Side of Manhattan Friday morning as a baby sat in the backseat of a car nearby, cops and sources said. The apparently domestic-related incident between a woman and her former daughter-in-law unfolded minutes before 9 a.m. on East 88th Street near York Avenue — just a block from Gracie Mansion, according to police and sources. One woman, the daughter-in-law, was pronounced dead at the scene while the other was rushed to New York-Presbyterian Hospital, where doctors declared her dead on arrival, sources said. The mother-in-law’s grandson – a 1-year-old boy –...