The Unforeseen Consequences of Role Play

I'm in my late twenties, a grad student who has been playing the role of Mommy for several months with an older man named Alex. Our relationship is built on this dynamic where he assumes the role of the naughty child and I take on the nurturing, disciplinary side. Everything was consensual from day one, with clear boundaries set up and respected. We've had our ups and downs like any relationship, but there's one incident that keeps nagging at me. A few weeks ago, Alex wanted to explore a scenario where he was more insistent on pushing the limits of his character, asking for things I wasn't sure about giving or doing. It became clear that this line between play and reality was blurring in ways we hadn't anticipated. During one particularly intense session, there was an exchange where Alex pushed harder than usual to test my boundaries. He asked me to discipline him in a way that made me feel uncomfortable, but he wanted more and more. It felt like the role-play had slipped into something I wasn't prepared for. Afterward, we talked it out calmly, expressing our concerns, and agreed to be more careful moving forward. Despite this incident, I feel conflicted about whether continuing as Mommy is worth the occasional discomfort of having to navigate such sensitive boundaries in a relationship already defined by role-play dynamics. It's just another layer of complexity that needs managing carefully if we're both still committed to enjoying our play together. I'm not looking for advice here, but confessing this helps me process it better.