**Chapter 4: Moonlit Transgression**

The darkness seemed to have a life of its own, as if it was urging Naruto on, his body moving of its own accord. His hand trembled as he reached down to free himself, his fingers wrapping around his shaft as he pulled it out from under his clothing. The air seemed to vibrate with tension as he positioned himself over Tsunade's body, his eyes fixed on her sleeping form. Without hesitation, he began to move, his hips pumping as he started to fuck her breasts. The sound of his hips clapping against her underboob echoed through the room, a rhythmic beat that seemed to grow louder with each passing moment. Tsunade's body remained still, her breathing steady, as if oblivious to the violation taking place. Naruto's movements grew more urgent, his body driven by a primal desire. He felt a rush of excitement mixed with guilt, as if he was committing a sacrilege. The moonlight streaming through the windows seemed to cast an eerie glow over the scene, as if illuminating a dark and forbidden ritual. As he continued to move, the sound of his body against Tsunade's grew louder, a steady thud that seemed to pulse with a life of its own. The room seemed to shrink, the air thickening with tension as Naruto's body worked itself to a frenzy. He felt a release building, his body coiling tight as he strained towards a climax. The world outside seemed to fade away, leaving only the sound of Naruto's ragged breathing and the steady thud of his hips against Tsunade's body. The darkness seemed to close in around them, a living, breathing entity that seemed to pulse with a malevolent life of its own. And yet, Naruto couldn't seem to stop, his body driven by a force beyond his control.