Unfulfilled Desires in Bed

I'm fifty-three and married for twenty years. My marriage is solid; we've raised two kids together, have a comfortable life, but lately I find myself craving something more than what we share now. A few months ago, while he was out of town on business, I started exploring fantasies that are far from the reality of our current sexual dynamic. I imagined him as an entirely different person, younger, more assertive in bed. He'd be dominant, commanding me to do things like take off my clothes quickly or bend over for a hard thrust from behind without warning. In these fantasies, he’d leave marks on my body, the kind that hint at roughness and passion, which our usual sex lacks entirely. I know this is just fantasy, but it's an outlet for desires I don’t voice to him out of fear we might not connect in a healthy way anymore if things changed. It’s strange how these images in my mind have become more vivid than the reality between us, each night spent alone is another opportunity for me to indulge in this mental escape, where every touch is raw and unrestrained.