"M-my lord?"
"Yes, sister? Please, come inside."
Sister Matilda nervously nudged open the door, the servo-joints of her powered armour whining with each movement. She stepped over the threshold and stopped just inside the door. She clasped her gauntleted hands behind her back with a metallic clatter to try and clamp down on any tics. The subject of her inquiry, Lord Ward, sat at his desk with his back to her.  One hand braced itself on the oaken table as he swivelled to face the Sororitas.
"What did you come to speak to me about? I was just finishing Gulliman's entry in the new Ultramarines supplement."
Matilda tried to swallow the lump in her throat, taking small and shallow breaths.
"I-I wanted to thank you for the w-work you've done for us."
"Oh?"
"Even though you've kinda reduced our numbers, the sisterhood thought that your reworking of the G-Grey Knights was divinely inspired, my lord."
"Ah, I see. Your humble gratitude does you credit, sister."
"T-Thank you, my lord."
Lord Ward stood up from his chair.
"Was there anything else you had to say?"
"N-no, my lord. I carry only the thanks of myself and my sisters."
He took a few steps towards Matilda, open-toed sandals flapping on the flagstones.
"Because I am sure that you brought something else along. Something that would show how grateful you are."
Ward reached out one arm and grasped at Matilda's collar, scrabbling at the gilded iron but finding no purchase. The sister darted back with blistering speed, the soft whine of servos suddenly accelerating to a piercing shriek as she moved.
"My Liege! What are you trying to do?"
"You will submit to me, sister. I created you. I can do whatever I like with you."
"That's not true, my liege! Fan material counts as well! There are entire websites of-"
There was a sharp crack as Ward harshly brought his hand around in a slap, impacting on Matilda's fair cheek. She brought a quivering hand up to her face, brushing the point of impact with her fingers with a shocked expression on her features. Ward's own face was red and sweating with exertion and indignation.
"I control the lore! I control what is right and what is wrong! The Sororitas are MINE to give and take awa-"
"HOW DARE YOU!"
Matilda was shaking with barely-restrained rage, her armour's joints whirring gently as they tracked her jitters.
"HOW DARE YOU STRIKE A SISTER OF BATTLE!"
Ward raised his hands towards her in mollification.
"Now wait a minu-"
Matilda ignored Ward and pulled back the fist that had been touching her face, pushing it forward with the mechanical assistance of her power armour and punching him in the face as hard as she could muster. Ward stumbled for a second before she continued.
"YOU ARE CLEARLY-"
She struck him again, this time in the stomach. Ward folded up around the blow and crumpled to the floor.
"-UNFIT TO-"
A sharp kick from a pointed sabaton propelled him across the cold stone floor.
"-CONTROL ANYTHING!"
Matilda stood, heaving and panting, while Ward tried to curl up into an even tighter ball on the ground.
"Not so powerful now, are you, you stupid little ass?"
Matilda's voice was cold and disdainful. Ward only whimpered. His robes had ridden up his legs, nearly exposing the sweaty globes of his buttocks. Matilda was struck with an idea.
"In fact, you are such a powerless dick, even Abbadon could conquer you. I could take what you tried to seize just now, with equal regard for your feelings."
Ward looked up between his hands just in time to receive a stunning blow from an armour-shod foot. He rolled over slightly, splaying out across the solid floor with a groan. Matilda stepped around and over his prostate form, eyes glaring down at the suddenly-powerless man-lump that quailed beneath her.
"You WILL give me what I desire, my Leige," she spat the last word, "or I will introduce you to so much pain that you will beg to be put out of your pitiful misery. Do you understand?"
Ward nodded with a whimper, trying to shield his face again. It was to Matilda's benefit, as she was able to easily flick up his unguarded hemline and uncover the wretched sight of his loins. She smirked.
"What sort of manhood do you call this? I have shot bigger stubber rounds!"
Matilda laughed a high, pitying laugh. Ward squirmed and whimpered, then there was a faint trickling noise. The Sororitas looked down to see him emptying his bladder on himself in fear, a weak stream pouring from his flaccid stub to soak his robes and pool on the flagstones.
"Disgusting. Can you not control yourself, you pitiful wretch?"
"S-sorr-"
"SILENCE."
Matilda kicked him again with an armour-shod foot, impacting on his thigh and perilously close to his groin. Ward sqealed and clutched at his leg in agony.
"You will clean up your mess before I even think about using you for pleasure. Nobody wants to use an unclean tool."
Ward could only whine, eyes swiveling upwards in supplication.
"H-how-"
Matilda leant down and picked him up by the scruff of his neck, then pushed him back down again onto his hands and knees face-first into his own mess.
"Lick. It."
Tears streaming down his miserable face, Ward started to lap at the yellowed puddle. He grimaced and tried to pull away, but Matilda simply gripped his hair as well and forced him down, administering stinging slaps to his backside whenever he looked like stopping. By the time the urine was merely a damp circle that Ward was dragging his tongue over, he was openly sobbing and both cheeks were crossed with welts from the hard decorative spurs of Matilda's gauntlets. She suddenly pulled him upright, then forced him down again onto his ass. Ward cried out in pain as the welts met the solid stone floor and received another hard slap to the face for it. Matilda glared at him.
"You must be an overgrown baby. You're chubby, you soil yourself, you cry, and you have a tiny shaft that is barely worth anyone's consideration. Are you a baby?"
Ward only stared back in terrified confusion, eyes swiveling from side to side as his chin was grasped in the cold vice-like grip of the sister. She shook his head around, displeased.
"Say yes! Say you're a baby! Say it!"
"O-oh god, yes-"
"Yes what?"
"Yes, I'm a baby!"
"I knew it! We're going to have to change you, you big baby! The Schola curriculum covers ALL aspects of life, including caring for infants. But you wouldn't know about that, as you touch yourself to your precious magic giants all day! Imagine that, a baby with a hard-on for big boys!"
Matilda laughed again, and let go of Ward's chin to yank off his now-stinking robe. She roughly manhandled him to take it off, pushing and pulling at his arms before it came free.
"Actually, I might keep you like this. Babies don't get to wear clothing."
Matilda strode over to the room's window and threw the garment out, watching it flutter away in the breeze to the lawn some ten stories down. She clicked her tongue in satisfaction.
"There. Someone will pick it up."
She turned back to see Ward reaching out, eyes bulging after watching the last shred of decency he had left flit away.
"Now that you look like a baby, it's time to feed you like one. You'll get what you were reaching for, you little ingrate., but only on my terms."
Matilda reached to her shoulders and undid the clasps there, allowing her armour's breastplate to fall to the floor with the loud clang of metal-on-stone. She kicked it to the side with a metallic scrape. Revealed was a modestly buttoned under-vest which she wasted no time in undoing, ripping the last toggle and pulling the whole vest open to let her breasts hang free. Matilda sighed with relief as they were exposed, gently massaging them.
"Emperor, it feels so good to let my chest breathe."
Gently palming her left breast, she stalked over to Ward and stood astride him, armoured legs forming an arch that gave no escape. She kneeled down and started to guide the teat to his mouth, then stopped.
"Wait, you're still unclean. Your mouth is still full of your own filth."
Matilda let go of her bosom and stood up to move to Ward's desk, grabbing the water jug that sat there. She turned around and advanced on him, terrible intent visible in her eyes. Matilda grabbed Ward's chin again, forcing his jaw open and pouring a measure of water in before pushing it shut. She grabbed his nose and held it shut as Ward goggled in terror, staring at her exposed breasts which jiggled with every wrathful shout.
"Rinse it out. Then swallow. I want your mouth to be clean before I use it."
He feebly nodded and swished the water around, swallowing with difficulty. Matilda held the jug over his face.
"Again. I want it purified."
Ward had no option but to obey, his mouth opened and closed by the sister's forceful armoured hand with fingers pinching his nose while he gargled. After half a dozen terrifying rounds, Matilda finally nodded with satisfaction.
"Good enough. The rest is for everywhere else. Wash yourself."
She poured the remaining water in the jug over Ward's naked body, forcing him with kicks and shouts to wipe away any trace of the urine he had cleaned up. When he was clean enough, Matilda pushed him back over with a foot and threw away the jug to join her breastplate in the corner.
"Now you are washed, you can be fed. Lie there."
The sister stood astride him and kneeled down again, picking up where she had left off by steering one light brown teat towards his mouth. She pulled his mouth open with her free hand and rammed herself in, almost smothering him with her soft pale skin.
"Mmm, what a good baby. Suck on my teat, little child."
Ward nodded and tried to slurp at the nipple pushed into his mouth, tears streaming down his cheeks. Matilda gave a small smile of pleasure and let go of him, trusting him to continue ministrating to that sensitive spot while she worked on the others. Running her free hand over her arms and stomach, she tried to reach her most holy point with her fingers under her loin-guard but was frustrated with a lack of progress against the solid armour. She settled for her neck and other breast, stroking her own skin with iron-clad fingertips in a curiously relaxing way that mixed with the wet sensation from her suckled teat. She tilted her head down to lock eyes with Ward as he sucked, then stroked his hair in a motherly fashion that almost stopped him from slurping.
"Shhh, drink your fill my little baby. I have so much for you. Such a good boy."
Now Matilda was beginning to blush, the slow stimulation against her breast starting to take its' toll. She reached behind herself to grasp at Ward's groin, finding to her delight a half-formed erection. She slowly stroked the tip, feeling it resist her slight pressure.
"Looks like my little boy is growing up. And growing so hard, by the Emperor."
Matilda looked back down to see Ward trying to say something with his eyes.
"What is it? What's wrong, my little baby?"
His eyes flicked down, towards her gauntleted hand.
"Ohh, you poor thing. Do you want a gentler touch?"
Ward nodded, something like relief creeping into his features. Matilda sneered and gripped his shaft with her iron-shod hand, hard. Ward screamed into her breast, unable to move due to the sister's heavy armoured weight kneeling astride him.
"Too bad, little boy. Only good boys get the soft touch, and good boys get it rough. Do you like it rough, little boy?"
Matilda pumped his shaft roughly, scraping up and down with little regard for Ward's pleasure. She watched him shake his head from side to side, and grinned as she felt him become even harder.
"Your little soldier says you do, you big baby. I think you do."
Matilda pulled back, pulling her breast from the suction of Ward's mouth. A thin trail of saliva bridged the two for a moment before it broke and Matilda stood up. She gently placed one foot on his erect shaft, pinning it to his belly. Her armoured sabaton was made in the style of a high heel, and the sharp point was poised right over it. Ward stared in horror as she inched closer and closer, unable to do a thing with his mind clouded with fear and pain.
"Bad boys get punished. If you're such a good boy, get up on your knees and lick me."
Matilda reached around to her back and undid something, loosening the metal skirt around her waist and allowing the whole section to fall like the breastplate. Revealed was a set of billowing bloomers that continued into the legs, but Matilda was able to pull it down just enough to reveal her holiest place. 
Ward stumbled onto his knees and shuffled closer, reaching out with his tongue towards the sister's privates. Matilda suddenly seized his head, pressing it into herself and almost using his face like a sex toy. She kicked him lightly in the groin, causing him to moan in pain.
"Get licking! I want to see how good a baby you are."
Ward tried to choke back fresh sobs and pleasure the sister as well as possible, licking and sucking before she tried to kick him again. Matilda groaned as Ward suckled on her little nub, pulling him back slightly to yank on it at the same time.
"Yesss! More!"
Matilda started to rock her hips, grinding herself all over his face and using his probing tongue only half the time. Ward spluttered as his breathing kept getting cut off by her warm, moist labia. Suddenly she pushed him away, toppling him onto his back and kneeling astride him again. This time she was over his legs, her armoured thighs squeezing his together.
"Such a good boy."
Matilda stroked up and down Ward's shaft, which had softened since it was last handled, with her still-gauntleted fingertips. She swirled around the head, pushing into the foreskin and feeling the head inside.
"And good boys-"
She pulled away and took off one gauntlet with the other hand, flinging the metal glove away. Slowly, she crept her alabaster hand up his thigh and stroked up and down his half-mast, causing it to engorge and straighten flat along his lower belly.
"-get the soft touch."
Matilda locked eyes with ward again as she gently grabbed him with a soft, dainty hand and pumped slowly, working the foreskin around the central shaft. He was already moist, his tip leaking all over himself.
"Still dribbling all over yourself, little baby?"
Ward nodded, completely lost. Matilda leaned down, breathing on his shaft with every word while she worked it with her hand.
"Then I'll have to clean it all up, since you're so helpless. Crawling around on the floor, unable to clean yourself..."
Matilda launched herself down and onto the rigid pole with a throaty moan, slowly bobbing up and down while working her tongue past the foreskin and pushing on the head's thin slit. She used her fingers to stroke any length not in her mouth, sometimes letting her fingers past her lips so she could suck on them at the same time.
"Mmm. Hmm mm mmm."
Ward just nodded and gurgled, his mind a complete blank except for what Matilda told him. She felt his shaft begin to throb and pulse, signalling the end of his stamina. She quickly pulled away and off his shaft, squeezing the base tight with her slick fingers and grinning while she watched him squirm and whine as he tried to orgasm. As drips of saliva hung down from her lips to her chest, she laughed and pointed at her drooling mouth.
"Such a good baby, doing this to me. But babies don't get to finish, they're not capable. Only big boys get to finish."
Matilda teased him again, drooling on the head of his shaft and into the little pit formed by his foreskin. She could feel it continue to throb, trying to reach release. 
For what seemed like hours to Ward, the sister continued to play and tease until he was completely broken. She focused on the head, licking only what she could reach through the foreskin. She bit him, lightly pressing around the shaft and sharply nipping on the end. She wiped off all the lubricant he had produced, and rubbed his dry shaft raw until he couldn't stop squirming. She even ground herself on the flat of his rod, replacing his lost wetness with her own as she came while he was denied another release. His eyes were unfocused, his head lolled around and his limbs had gone slack. He whined and moaned with every touch, reaching the tipping point again and again but never allowed to push his seed past the smoothly squeezing fingers of Matilda. For her part she worked herself to crest after crest, her pleasure intensified by the helpless suffering before her and the soft whines of jealousy she provoked every time Ward saw her reach another shuddering crescendo. Matilda smirked as she watched him whine and scrape at the floor during the latest round.
"Aw, is the little baby boy frustrated? Do you need to go do the special potty?"
Ward could only frantically nod his head, moaning pitifully.
"Only big boys get to do the special potty. Are you a big boy?"
Another nod and whine.
"You'll have to prove you're a big boy, and not some baby who makes messes and doesn't clean them. I'm going to go over here-"
Matilda rolled off Ward and crawled away, revealing her uncovered rear and letting her holy places show between her legs.
"-and if you think you can take the special toilet, then you can go. But ONLY the special toilet. No touching yourself, or you'll be punished. I'll stop you going to the special toilet forever, little baby. How would that feel?"
Matilda looked behind her. A shake, and a whine.
"Good. The special toilet is really special. It's the one on top. Can you see it, little child? The small, dark one? The one below is the boring toilet. We won't be using that again today."
A nod and a whimper.
"Maybe you'll get to use it another day, if you use the special toilet properly like a big boy. Are you a big boy?"
A frantic nod and a whimper.
"Then come and get it! Crawling only, because you're a baby. You'll only get to be a big boy afterwards. Come and do the special toilet!"
That was all the encouragement Ward needed. He quickly leapt up onto his hands and knees and darted after Matilda, crawling after her on all fours even as she began to evade him. She crawled away, teasingly keeping out of reach with her armour's speed and reflexes. She darted to one side of the room and wiggled her rear, letting Ward get a good look before leaping away from a charge. Another gain and she stopped to rub her tiny hole, enjoying the sensation for a second before darting from his reaching hands again. 
Each time she gained on Ward, she allowed herself to tease a little bit further. First a gentle press on the muscular ring, then a deep pull on her other holy spot while she went back to stroking the smaller entrance. By the time she was pushing a finger in, a single dart in-and-out that made her groan with pleasure, Ward was almost about to collapse. His shaft was inflamed, and would likely let go with the mere stimulation of being crushed against the floor if he fell. Matilda had no intention of letting such a primed vision go to waste. She played with herself faster and harder, attempting multiple strokes into her tiny entrance before Ward could catch up. She started adding a little lubrication, slathering her finger in saliva before plunging it in her behind and swirling it around the soft walls inside. It was when she tried to push two fingers inside that her hubris overtook her ability and Ward finally caught up, pinning her and madly trying to thrush inside anywhere it would fit. Quickly, Matilda grabbed his shaft before it could rub against her skin and set itself off. She clamped down on the base again to avoid a premature end and lined it up.
"Such a big boy, a good boy. You found the special toilet. Are you ready for the special toilet?"
Ward nodded vigorously and tried to push in, but Matilda held him back.
"Wait for it, baby boy."
Ward tried to push again.
"Wait for it."
He tried again.
"Okay! Go do your special toilet, you good boy!"
Matilda let go and let him slam into her rear, getting about halfway before he stopped.
"Oh, Emperor! You did so well! You got so far inside my special toilet! Now do it!"
Matilda shuddered as she felt Ward's pent up release flood inside her, the built-up seed continuing to enter her body for several seconds.
"Oh my Emperor! Yes!"
She felt another crest wash over her and collapsed, dragging Ward down with her. They continued to twitch and moan on the floor, joined at the waist by pleasure.
"Oh, Emperor... yes..."