Exploring Boundaries With My Partner

I've been in an open relationship for six months now, and it's given me a lot to think about. Last night, after the kids went to bed, I invited my primary partner over, but this time, we did something different. We decided to role-play as dominant/submissive partners, with him taking on a strict control over me in every aspect of that scene. It was intense and very explicit, he tied me up, used some toys, and pushed boundaries way beyond what we usually do. I found it incredibly arousing but also challenging, questioning my limits and desires. This experience left me wondering if there's more to explore within our open dynamic.