Dantalion actually liked Vepar. He had a sense of humor about almost everything, which was sometimes lacking among the denizens of Hell. And sometimes he went and did things like, well...wiring himself up on coffee and acting ridiculous.
So of course he had to see that. And if that involved him bringing doughnuts (and Naamah being herself), then that was a price he was willing to pay. And no sooner had he set foot on the boat, then he was being hauled inside by Vepar, who was grinning like a maniac. "Well hello to you too, sunshine," he said.