Oh yes, it wasn't that she didn't want people to know. That was why she immediately concealed the truth of who she was talking to when it was asked. Kylo was not going to say I told you so but it was a close call.
A bond between Master and apprentice...?
"That's not what we are," he said to Rey, "there must be another form. Luke and Leia have a mild Bond. They can sense and communicate with each other. Not like this but..."