Realize you made a bloody stupid mistake.

You got to organize protecting the place, and realize you forgot something very important. The barbarian is a player’s Avatar, and Players probably know what their avatars do. And you just showed her the hidden area!

You groan, and tell everyone. They groan as well. After a bit of swearing in demonic, the hag turns to the captive and tell her “If ye do na accept a geas not to reveal what ye learnt here, more than 4 Players will be begging for death and the torments of Hell! Do I make myself clear?”

The captive shuddered and accepted the geas.

While that was happening, your group kept an eye out.