Mommies and Playtime with Daddy

I've always thought of myself as a fairly traditional person, but when I met my partner, we discovered an unexpected side to our relationship. We started out just experimenting in the bedroom, trying different things to spice up our sex life. It's not like I had any background in BDSM or kink play, I mean, who does at 30? But one day, we watched a film that featured this dynamic where the woman was very much in charge and the man acted quite submissive. It felt strange watching it but also...interesting. So we started incorporating some roleplay into our sessions. At first, it was just him calling me 'Mommy' and referring to himself as 'Daddy'. He would wear a diaper for some scenes, I guess he enjoys being the baby? I don't mind diapers or changing him. It's all consensual of course. But as we went on, I found myself taking charge more and more. I like having control in these sessions. The dynamic is exciting and it’s not something that turns me off. Sometimes, though, when he asks me to spank him lightly or give him a stern talking-to before sex, I wonder if there's something deeper going on here. Is this just playful kink? Or does he want more from me than I'm comfortable giving? The role-play part is fun but what about real life? When we're not in the bedroom, it’s back to equal footing. So...what do you guys think? How do other people handle these kinds of dynamics without crossing any lines or losing sight of who they are outside of the playroom? Is it normal for me to be a bit torn about this? Would love to hear your thoughts.