Luna might like Catherine, and she might like me, but she looooooovvvvves Jack. She follows him everywhere. Sits at his hip when he eats, trips him up when he's walking. If he's lying down, she comes down and flops her little body not just near him, but right on top of him. She's begging to be groomed, and since that is what Jack likes to do best in the world (he'd groom everyone in the household if we'd let him), the relationship is now working quite well.