He just before decided to travel with bunch of adventurers ...
Not adventurers, mercenaries. Not travel, but visiting a location few kms away.
Yes travel ... He specificly tells you that he intented to follow them to Selune temple, where they all wanted to search for entrance to underdark. O_o
In the words of the senior NCO instructor at cadet battalion: “If you ain’t cheating you ain’t trying. And if you got caught you didn’t try hard enough!”