Talk about friendly exes! In early April, Bruce Willis decided to hunker down in self-isolation with his ex-wife, Demi Moore, and their daughters, Tallulah, 26, Scout, 28, and Rumer, 31. Conspicuously missing from the photos they posted on Instagram of them in matching pajamas? Bruce’s current wife, Emma Heming, 41. “She stayed at home with their kids [Mabel, 8, and Evelyn, 5], and while she didn’t let on that it bothered her, she wasn’t that happy about it,” a source tells In Touch . “She definitely felt left out.” Demi, 57, and Bruce, 65, were married from 1987 to 2000. In her memoir, Inside Out , Demi admitted the split “wasn’t easy at first, but we managed to move the heart of our relationship, the heart of what created our…