The Master takes the woman's backing away as his gaining the upper hand. He's angry now, and perhaps a little more heedless of danger then he might usually be.

“Where is he?” He demands, with the sudden paranoia of the unhinged, advancing on her; tall and overbearing compared to her slight form.

“Did he do this?” He indicates the Enterprise in general. “ I mean... trapping me on a vessel full of hostages? Very not smart. Something must have gone wrong. Yes. That's what happened, isn't it ...Isn't it!”