Xaden 2nd signet

Hi! So I have a question about Xaden 2nd signet. We know he can read intentions, but I keep missing something. Right now I read OS again and I pay more attention to some details and I keep seeing Xaden reading Violets thoughts without her sharing them through their bond, but something like this happened again in the first book where he read a though and she said she didn't mean to say it out loud. Am I just confused, and that was just an intention he read? Did I forget something about his signet? Is it because he's Venin now? I really need someone to remind me or clear things for me, please 🙏🏻