yes they could and would detect her pee....if i was you just to be safe i would go get a bottle of Visine original(it has to be the original kind....the red bottle) take it with you in your pocket put 10 drops in your pee and youll pass with flying colors....you could also use sure-gel....take half a pack of sure-gel then buy you a 20oz bottle of water drink/pour it out till it reaches the top of the label then pour sure-jel into water shake water till its mixed up good then drink then pee right after your finished drinking said mixture...youll pass with flying colors....the last test i had to take i was geeking and i did both the visine and sure-gel and i passed