Octavius watched her, concerned at how upset she seemed to be, not just at what had happened but the fact she had to confess something. What could Joss have done that she felt she needed to hide herself.
When she finally confessed to being a member of the Class, he frowned. That was indeed serious, treasonous and meant death. It was really smart of Joss to use her abilities to get around that. "Can't you just change to someone else? You're not limited to this other woman are you?"