Emma, 34, is actually closer in age to her oldest stepdaughter, Rumer, 24, than to her 57-year-old husband, Bruce. No matter -- the Willis kids are used to having young stepparents. Before their mom, Demi Moore, split with Ashton Kutcher, Rumer and her sisters, Scout and Tallulah (not pictured), used to also have an equally young stepfather. Now, they also have a half sister -- Mabel Ray, who Bruce and Emma welcomed in May. Oh, Hollywood.