Chrissy Teigen following a milestone moment for her daughter.Teigen took to her Instagram story on Monday to reveal that 5-year-old Luna had recently had her first-ever baby tooth fall out — and that she then almost immediately lost it.«Luna lost her first tooth and the tooth fairy PROMPTLY dropped it down the sink,» Teigen captioned a video of a plumber taking apart the drain pipes under the marble countertop sink.While she was upset over the accident, Teigen found a ray of hope when the