Kim Kardashian‘s latest selfie doesn’t include a lavish set or a designer wardrobe. The Skims founder, 39, shared a closeup snap with her 10-year-old nephew, Mason Disick, on Friday morning, aka “My day 1.” — That’s what she wrote in the caption of the new photo on both Twitter and Instagram. Mason is the oldest of her sister, Kourtney Kardashian‘s three kids.