My Ex's Secret Admirer

After my divorce last year, I've found myself spending a lot of time at home. The house feels both too empty and too full of memories. A few weeks ago, one of the more challenging moments in our custody agreement came up, I had to drop off my ex-wife's birthday present and her daughter’s school supplies at their new place. I didn't expect any drama there anymore, but as soon as she saw me enter with a big smile, it felt like everything changed. She greeted me warmly, even helping out by putting the items away herself. The air was thick with unspoken tension that had nothing to do with logistics or schedules. We managed a small conversation about our respective lives before I left, but the moment I stepped back into my car, all I could think about was how much everything felt different. A few days later, something unexpected happened: My ex-wife sent me an email. At first, I panicked, thinking it might be related to custody issues or legal matters that were lingering unresolved. But then she mentioned a secret admirer who had been sending her gifts and messages, including some rather explicit ones. Her tone was casual but hinted at curiosity. I froze, wondering how much of the content between this person and my ex-wife I could actually handle reading, emails detailing intimate desires and playful teasing about past experiences together. The more I thought about it, the angrier I got. It felt like she had an entirely different life on the side, one that didn’t include me except as her former husband. And yet, there was also a part of me intrigued by the idea. I reached out to my ex-wife once again, asking for more details about this admirer’s identity and what kind of interactions were happening. She brushed off my concerns, insisting it wasn't personal or connected to me in any way. I didn’t believe her, but there was nothing more she would share. Now here I am, still feeling conflicted but also strangely defiant. Part of me wants to confront her about this stranger who seems to know the ins and outs of our marriage so well. Another part wonders if it's healthier for both of us to let these new connections form freely after such a significant life change. Am I being unreasonable, or is my reaction normal considering all we've been through? Should I reach out directly to this admirer to confront them myself, even though that sounds insane?