My Secret Training Session Gone Wrong

I've been a personal trainer for over a decade and recently I started exploring the world of Mommy/Daddy play. It's something I've always had a soft spot for but never really acted on until now. My boyfriend, who we'll call Alex, is incredibly supportive and has encouraged me to explore this side of my sexuality. He even suggested role-playing as a young man seeking guidance from an older, more experienced woman. This wasn't just exercise to him; it was about emotional support too. We planned our first session carefully, making sure everything felt comfortable for both of us. I had prepared workouts that were physically demanding but within Alex's limits. We talked about the tone and nature of our interactions ahead of time to ensure we were on the same page. Everything went smoothly during the initial part of the training session where I was his tough, no-nonsense personal trainer. He was pushing himself harder than he ever had before and seemed really excited about it. But then things took an unexpected turn when we got into the role-playing aspect. Alex asked me to be a bit more assertive in my coaching, pushing him both physically and emotionally. It all felt incredibly real to us; I could see how much it was helping him open up about some struggles he's been having with his job and personal life. But then something shifted inside of me. I started playing the role a bit too enthusiastically, perhaps even crossing a line or two in terms of pushing him physically harder than what we initially agreed upon. By the end of our session, Alex was sweating profusely but also emotionally raw - he had truly poured out his heart to me, and while I didn't go far enough to hurt him, there were moments where I felt like I might have pushed a little too hard. We ended things by discussing it openly; both of us agreed that while the experience was intense and emotional in ways we weren't fully prepared for, it left us questioning just how far we should take this dynamic. So here's my confession: as much as I loved exploring this side of me with Alex, there were moments where I felt like maybe I went too far. We talked about setting more clear boundaries moving forward but also wondering if it might be healthier for both of us to ease back on the intensity a bit. What do you all think? Is what we experienced normal, or did I overstep in our role-play?