Fucked under the shower by the unexpected guest

The evening took an unexpected turn when Captain James Anderson, my husband's FBI boss arrived, ostensibly to discuss matters concerning his worries about the effects of my husband's latest case on his private life.  His presence was overwhelming, not just in authority but in physical stature as well. The captain's physique was imposing, muscles outlining his frame in a way that spoke of strength and control. It didn't take long to become clear his visit harbored intentions that strayed far from any professional concern. "And rest assured that I am here to help with any duties that your husband might have trouble performing," - he winked - "both professionally and at home."  The blood rushed to my cheeks hearing those bold words.  "I... I'm not sure that is appropriate thing to say, Captain Anderson," I responded, my voice betraying a hint of my nervousness. He just laughed it off, "A good girl would be sure that my words are not appropriate, but you are not sure, so... are you a bad girl, Mrs.G?" I just chuckled and started saying "I'm a good girl!", when he suddenly stood up and told me he needed to use my bathroom.  Thank god, I thought, because I needed a moment to collect my thoughts.  But the respite was short-lived. "Hey! Mrs.G! come here!" - his  voice echoed from the bathroom. I found myself captivated by his commandeering voice; stood right away and went to the bathroom door. The door was open, and when I peeked inside,  to my shock, I saw the captain was over the toilet with his  dick in his hand apparently just finishing pissing. He was looking back at me.  "Oh!" - I protested and started retreating , when another order followed "Wait! You say you are a good girl? Then let's see how well disciplined you are. Get in and help me clean my dick up!".  I found myself drawn to the bathroom door, conflicted yet captivated by the unfolding scenario. I entered and I watched him as he was taking all of his clothes off - the captain was not a young man, maybe 5-10 years older than me, but he was still a muscular giant,  embodiment of confidence and forbidden allure. And his dick... I couldn't help notice... his dick was enormous even as it was hanging down. He then stepped into the shower - and as the water fell on his body, it seemed to amplify his imposing physique, each drop tracing the contours of his muscles, highlighting the strength that lay beneath his skin. "Get in." he murmured, his voice enveloping me. If there was any reluctance left behind the arousal I was feeling, it was now fully melting away. The whole situation, weird as it was, stirred something within me—a desire I hadn't anticipated, a yearning for being fucked by this enormous man. Spellbound, I took my clothes off an joined him under the shower.  "Wow, what a bad girl - it seems the juices are already flowing..." - he said looking down at me, and I instinctively covered myself ashamed of it. But he took my hands and gently pull them away.  "I always wanted to fuck that nice pussy." - he said.  Then he turned me around. A wave of desire washed over me, leaving every nerve alight with anticipation as he easily positioned my body so my pussy was now right over the tip of his enormous dick. A flush of heat radiated from the spot when it first touched me, and then my breath caught in a momentary pause,  it started sliding inside me. Even from the first entry I trembled on the edge of ecstasy, and each new shove was causing an involuntary screams to leave my mouth, pushing me closer and closer to the brink. "Best thing about fucking you under the shower is that there will be no proof of the crime." - he said.  "Fuck me, please" - I heard my own words.