A Tennessee mother shot and killed a man she found hiding under her 13-year-old daughter’s bed, according to cops — and now she’s facing first-degree murder charges. Kendra Scott was arrested after police found a 20-year-old man dead from a gunshot wound in the back of his head outside her Memphis home just before 2 a.m. Thursday, according to an arrest affidavit obtained by The Post. Her lawyer called the situation, “the worst nightmare of any parent of a 13-year-old girl.” The 36-year-old mother told officers she came home and “saw a dude under my kids’ bed.” “And I did...