The wolf, halfway up the wall already, hears an odd noise and looks over to find that the dog had finally cum, and that meant that whatever poor soul had been inside his cock before was now squirming around in his mouth, waiting for the giant dog to swallow him down. Getting a good grip with one hand the wolf makes a circular gesture on his chest, representing the cycle of things, before continuing, praying silently for his own safety, and that the one who was about to be swallowed stayed alive awhile inside the dog's stomach, if for no other reason than it would provide a good distraction.