We have a new co-worker, Jessica, who is a new mom and just out of high school. She is already making a bad impression on the co-workers: coming in late, having a know it all attitude. I've heard other employees (Kris and Cathy) say that she isnt long for this job and one of them said the manager, Toni, agrees. I told the new girl that people have been saying that they are unimpressed with her work ethic and that she needs to be careful. I asked her to not tell any one what I said and she agreed. 
I worked with Jessica again today and she said that somehow Toni said she found out that someone had said these things to her and wanted to know who it was. She didnt tell her but Toni went to talk to the store manager.  I work with Toni tomorrow. Toni has already talked to other employees to find out who told Jessica, so I'm sure I'll be asked tomorrow. 
Moral of the story: never help anyone.