"Let it be, Umlo," Grond says, "We've bigger fish to fry. The gobbos'd be laughing themselves silly to hear us now. Let's have a truce till the business is done, aye?" It's difficult to say, but Grond may be extending the truce to cover Korpi as well. Though suspicion will certainly remain.
"Vigilance, most like," Grond remarks, "Looks like I owe ye a couple of pints, Umlo," he continues, looking only slightly disappointed, "Little devil must have a cast-iron stomach."