Your intentions were good, but your spying was not. The papers were private, so you shouldn't have been reading them anyway. Your friend's job performance is between her and the boss. Furthermore, you might be jumping the gun. Being put on probation isn't the same thing as being fired.
Supervisors often give employees time to improve their performance, with specifics on how to do it.
Your only obligation is to be there for her as a friend after she gets critiqued. Check out our Etiquette Dilemmas message board in the GH Online Community. All rights reserved.