A real shame, if she's been trustworthy for the 2 years then maybe there is a story behind it, probably she's been convinced by someone else to do this and might not comprehend the hole she's got herself into now. In my view, end it the right way, don't blow up on her and make a scene, there is no value to you in doing that.
Let her go, say it's a shame and if she needed more money then she should have asked you first to see what could be done. She'll feel gutted and disappointed in herself more than vent anger at you.
Let her go, say it's a shame and if she needed more money then she should have asked you first to see what could be done. She'll feel gutted and disappointed in herself more than vent anger at you.