Probably not what you'd expect to watch over the pack's pups, but Morgue is surprisingly a good babysitter. He's like Cullen in that he prefers to be told what to do, and thus has bonded with Cullen most rapidly. However, he doesn't like working with others much and that's why he's best suited to be a lonely pupsitter. He can be impulsive, but he's protective of little ones and ensures no harm will come to them.
After Cullen left the pack, Morgue acted rather sullen for a bit. Until one day he came home with a pup in his maw. The Alphas were shocked, but decided it was his way to cope with the loneliness. The pup named Caelin saw him as a teacher and mentor, and hung on his every word. As she grew into a competent adult, she realized her feelings for him were even deeper. He realized it too. She wasn't just some pup he guided. She was his closest companion.