Years ago I used todo undercover at a major store here. The hardest thing was grabbing the kids with the kids stealing because they suffered the fear of everything also. It seemed to be the thing for a lot of kids to try at least once but unfortunately they get caught and punished for that cheap thrill.
I think you did good with your girls but I agree, peer pressure when stealing is a big thing
and more then likely they won't try it again.
But I do hope your anger eases up a bit with them.Like everything almost kids have to try it themselves to learn. Mom telling them doesn't always get thru. And I used to tell my teens at the time I better not ever catch you stealing cause I won't come get you for that. They knew I meant it but they saw how close I was to it that year and when I arrested some of their friends they weren't toeager to explore that stealing field. And the friends, had plenty of money to buy. (That is sad but often the case)