[Sundae]

If she wants to justify it to herself, ahe will do. The why isn't your concern - all you have to do is make it too difficult for her.

If she is intent on stealing, she will leave you and go to a salon that it is easier to steal from. That's going to hit you hard, but if she's committed to stealing your only other option is to put up with it - not an option in my opinion.

So yes, tighten up procedures and get a camera. She will either go back to being an honest employee or leave. And in the mean time, make sure you keep an eye out for up and coming honest talent.