L can talk to whomever she wants. She just cant break your confidentiality. The fact that she returned a phone call per a message is not breaking your confidentiality. How do you figure it is?

If just talking is breaking confidentiality, then what about the million cop shows where the detective TALKS to a priest or a doctor or a shrink?

Again, I dont understand what she did wrong that upset you so. She is allowed to return any phone message without your permission.

To find the answer to a problem, you have to ask the right question. The right answer to the wrong question does not advance your knowledge.