Bob gave Peter a very dark look before putting effort into putting his more amiable mask back up. It wasn't that he thought Ogma should be faithful to Danu but someone had been kidnapped in a way that might be related and Peter hadn't mentioned it. They were going to be "discussing" that later.
He focused his attention on remembering that strangling a CIA analyst in the office of an FBI agent was not a good thing to do. However tempting and well deserved that strangling might be. They might have another chat about the CIA thing and springing it in conversation later.