Just be careful. I'm suspicious of waywards by nature, so I'm probably the "high test score" here, but it wouldn't hurt to DISCREETLY verify where she is tonite, if you can.
But only if the answer changes your position, and your strategy (example: an EA wouldn't be a dealbreaker with you, but a PA would be . . . or EA/PA, NOT a dealbreaker, but deceit about it IS). Otherwise, just assume she probably IS still in contact with the guy, and proceed accordingly.