Indeed, in the previous moments she looked to be having so much fun watching her younger self and the Doc. She seemed to be enjoying the moment with a lot of almost impenetrable aloofness which just collapses in her eyes when Seven walks in. It is a wonderfully well played moment.
I love the whole sickbay scene. How Janeway and the Doctor discuss in low voice not trusting her and how The Admiral is sat down in a bio bed looking at them with that smirk and being a cool cat. Love the good Admiral.