Getting dirty in the shower

He stepped up behind her in the spacious shower (it was nearly eight feet to a side, large stalls for exactly this reason) and wrapped his arms around her. She shuddered minutely for a brief moment, but she was becoming quite familiar with the routine. He caressed her wet skin, rubbing her shoulders, her back, her belly. Her head leaned back, but Mark couldn't see whether her face bore a look of pleasure or of resignation. Pleasure would be a nice thing for once; he felt she had been enjoying their time together a little more as he became more familiar to her. His hands slipped down to her breasts and her breathing caught, then quickened. Her own handcuffed hands began to strain and clench at the air in front of her, her fingers flicking out and raking the air. One of Mark's hands left her breasts and sunk into her hair, running through the wet, heavy locks. He tugged a little more forcefully and her head jerked back as she hissed with either pleasure or pain. He bent his head down and licked her neck, enjoying the view down her chest from over her shoulder. She pressed her back into him, pulling her breast out of his grasp, and he gripped the nipple and squeezed it a little, just enough to elicit a gasp. He rubbed his thighs on hers, his stiff member sliding across the skin of her ass. Her body was trembling slightly now in fear or anticipation and unable to resist her any longer he drove her towards the wall.

She flung up her hands to protect herself from smashing into it as he slammed into her from behind, his cock grinding on her ass. She braced herself as he drew back and thrust himself into her, drawing a slight cry from her as he rammed himself home. Her hips writhed as he pushed deep into her cunt, wriggling away from him before pushing against the wall and driving her body against his. As he thrust himself within her, each stroke was accompanied by an exhalation from her, almost like the air was being driven from her body. Her gasping increased in volume as he pushed her further, muting into a long, drawn-out half-wail that drew up to a series of cries as she crested into a writhing, breathless orgasm that bucked and whipped her body around. Mark stopped his thrusts and drew her against him, restraining and supporting her as her legs trembled. As she steadied, he began moving again, faster and faster, her trembling torso shaking in his arms as her momentarily sated senses found further appetite. This time it was him who climaxed first, crouching slightly and then driving himself deep into her as his cock pumped semen within her. She climaxed again as he did so, rocking even more wildly in his grip as ecstasy overtook her. Spent, his limp member slipped out of her as she slumped in his grasp, suddenly as passive and unresistant to his grip as she had been before. Sliding her to the tiled floor, Mark stood in the stream of water and luxuriated as, in the middle of war, he enjoyed some of the simplest of creature comforts.