[ Hal and Leeloo do not surprise her - it would make sense for GLaDOS to seek out the latter, and Cameron only became introduced to the former because of GLaDOS.
She wonders how the conversation with Katurian went, and who the woman was, but Alex's name is definitely the most unexpected on the list. ]
Was Alex unpleasant?
[ She knows that GLaDOS knows about her relationship with Nigel, even if she and Cameron haven't spoken of it. There's no reason to believe that the other woman hasn't picked up every unencrypted message on the subject. ]
no subject
She wonders how the conversation with Katurian went, and who the woman was, but Alex's name is definitely the most unexpected on the list. ]
Was Alex unpleasant?
[ She knows that GLaDOS knows about her relationship with Nigel, even if she and Cameron haven't spoken of it. There's no reason to believe that the other woman hasn't picked up every unencrypted message on the subject. ]