Just so people know where I'm coming from....The skulk in question is a pretty cunning bastard. He was intimidated enough by the groups threats to reveal the groups activities in the city, but not enough to reveal the easiest way to bypass the defenses of what is, essentially, his home. Despite their violent and murderous nature, life in the Darklands can be short and violent. A skulk on his own doesn't have a very high life expectancy despite the groups potential mercy. Rather then risking his clan potentially getting wiped out, or just Nia stabbing him in the face when no one else was looking...he decided to take chance.
Being a member of a society that doesn't put a lot of value in City Women....he naturally chose what he thought to be the most vulnerable (and valuable) hostage....
I think maybe he chose......poorly.