Well. It's not as if she'd discounted the possibility of his being here. Bruce certainly would be - but then again, maybe not; in their more private moments she's gathered that the bumbling socialite is either a gross exaggeration or simply doesn't exist. She's not sure how much (if any) of that persona he's wearing here in Baedal, when there's no call for him to maintain a high-profile public image.

Never mind who he's attending with. She's already discovered the Vault.

She maintains a holding pattern of sorts, engages a young man in idle chitchat and holds him in place with an inobtrusive cloud of pheromones - though from the way he was looking at her he wasn't likely to wander off. It simply makes him easier to dismiss when she's done with him and Bruce/Tom is moving again, and she drifts in his direction with just a touch too much purposefulness for it to really be drifting.