The response below is from my 24 yr. old daughter who lives in another state and is aware of the family dynamic.
It's not your place to tell her parents. They will probably find out anyway at some point. And if they've raised Kailyn thus far and she is now a thief, there's probably not much they can do anyway.
My daughter is right--they will find out eventually. I would also want to know if it were my child because the girl, Kailyn, is blabbing this to other kids and NOW their parents probalby know!! It is just so sad. I am a former juvenile probation officer and am not knew to these situations--it is just different when it affects you personally. This girl was raised in a home where this type of behavior is not acceptable. She has a job while going to school--money is tight in her family right now but she does not lack for the basics at all!! When I was in college, moons ago, some of the girls I knew from very affulent families were "teaching" the Iranian girl we all "adopted" on the ways of the Americans--shoplifting was one of her lessons!!! I was not there, thankfully, but shocked when I heard about there adventure. Unreal. This was not part of my social crowd activity --shocked. Stealing just was bad. I did a LOT of stupid things in my younger years--but this is just beyond my comprehension. It is so wrong to me. And anyone who does this I would NEVER trust. So with that in mind--maybe I should just stay out of this??? My friend knows that I was a former probation officer--her father in-law was a police officer. The parents will be so angry and disappointed and sad and etc. It is just horrible and I don't r want to be the one to give them the news. Then I do feel like if I were in my frind's position --as bad as it is--I would want to know soon!