A Secret Shared Between Us

I've been married for almost two decades now and have been a mommy for just as long. We live a life that's mostly routine and predictable, I'm a Mommy to my husband, who adores being the child in this dynamic. It's always been consensual between us, but there's one thing I never told him about because I was too ashamed of it. Last month, during our anniversary weekend at a cozy bed-and-breakfast, I decided to take things further than we ever had before. We both agreed on trying out something more intense, and as part of that agreement, I acted out the role of punishing him for some made-up naughty behavior with real discipline, spanking his bottom until it turned red, leaving marks visible through his pajama bottoms. It was surprisingly hot and intimate; I felt like a different person, but also deeply connected to my husband in a way we've never been before. The shame of that night lingers even though the act itself felt so pure and loving between us. Can anyone relate to this kind of secret?