My First Time Playing Little Space Adult-to-Adult

I've been married to my husband for five years now. We're both military and have moved a lot together over the last few years, but this latest post has me feeling a bit vulnerable about something I tried recently with him that felt really new for us. To give some backstory, we have a fairly traditional relationship dynamic at home. He's usually the one who comes to me when he wants to try something new in bed or spice things up, and while I'm always willing to experiment, I'm not typically the initiator. This time was different though, I felt an overwhelming urge to explore a little space dynamic, which is a concept I've seen online but never had any personal experience with. Before we got into anything serious, we talked extensively about boundaries and limits. We decided that he would take on the role of my big brother and that it would be an adult-to-adult thing with no pretenses about actual age differences or past events shaping this dynamic. It was clear from our discussions that everything had to remain consensual and grounded in a mutual respect for each other's wishes. When I finally suggested we give little space a try, he seemed excited too but also a bit nervous. The day came, and as I changed into my new outfit, a pair of oversized shorts and an old t-shirt, it felt like the most daring thing I had ever done. We started with a chat in our living room about some childhood games we used to play together; it was all very innocent at first. What surprised me was how quickly I slipped into the mindset of being his younger sibling. My confidence grew as I saw him playing along too, laughing at my jokes and indulging my whims. We ended up setting a few rules: no physical punishment or coercion, plenty of reminders that we're both adults, and a safe word if either of us felt uncomfortable. The day turned into one where I was allowed to be childish, throwing pillows around the house, watching cartoons, even trying on some of his old clothes. Each time, he acted like the older sibling, guiding me but also enjoying my playful nature. By dinner, we both agreed it had been liberating and exciting in a way that left us both looking forward to another session soon. I'm still processing how different this was for me compared to anything else I've ever tried with him. It's such an adult kink but felt so freeing and new at the same time. Writing this out makes me feel like maybe it's something others would find interesting or relate to, but honestly? I just needed to get it off my chest. This was our first real step into a world of play that had been there all along but we only discovered once we both felt ready for it.