naturally, if it exceeds the legal amount, it will constitute theft. It used to be 2 thousand, but now it is 1 thousand in some places. If it is over, but the amount is not very large, and you don't want her to be investigated for criminal responsibility, you usually say not to pursue it, and the public security organ can not file a case. Talk to her in private. If she really doesn't want to return it, you can report it. Then the stolen money is recovered by means of criminal incidental to civil affairs. Simple civil prosecution, but if the court finds that it constitutes a crime, it will take the initiative to hand over the case file for investigation.