Shoplifting teen

[Excel]

My 17 year old niece is currently visiting us from America. Yesterday her mum, my sister treated us to lunch in town. When doing some shopping after I allowed my 13 and 14 year olds to hang out with her whilst I did some grocery shopping. My niece shop lifted and I've said nothing to her or my sister. Should I.

Yes. I get that lots of teens fo this but she is coming from America and if she gets caught the consequences could be very serious for her

Absolutely it’s horrible behaviour

How do you know she's shoplifted?

I was outside shop waiting for them when they appeared American cousin went slightly ahead alarm sounded my two stopped looked around waited American cousin kept going andwalkex passed me, we had to search for her in shopping centre. She said she needed bathroom. When driving home she took cosmetic out whilst sitting beside my daughter. Then ran upstairs when we arrived home. My sister and her have difficult relationship and I do not want to cause more conflict.

If you don't want to cause conflict, leave it. I assume they'll be going home soon. Once she's gone have a frank conversation with your two about shoplifting, what they think of it, who it affects etc. They might not have been aware it happened but it's a good opportunity to discuss a real life situation with them.

Accusing someone of shoplifting is very serious. So unless you saw it with your own eyes you really can't be sure. Unless she's done things like this in the past. If she has a record of this type of behaviour then I would say bring it up to her but if this is completely out of her character then I would say leave it.