If you know all this info, I would personally not say anything but would do something different. I would send a letter or an email to the T and just say, "I know you have a restraining order against X and I wanted to tell you that he's shared he's coming back to do X. I wanted to give you a heads up so you could be prepared if necessary. I hope this doesn't come across as creepy, but I wanted to let you know."

I would not bring it up in therapy. Talk about opening a huge box of worms. I think when it comes to safety, though, that you need to do something. Imagine if something happened and you didn't say or do something? Who could live with that?