Thankfully this is pre-significant conversations, so she doesn't give off any signs at someone special.

"It was for the Captain, actually. A sort of joke, since I spoke to him at the wedding about there being no proper cake due to the lack of kitchens. And then we had the kitchen, and so making him the cake felt like the right sort of gesture. We dropped it off for him afterwards."

Which is why she knew what room the Captain and Skulduggery were in for the trial.