Going up the stairs, Steve motions for her to walk in front of him, so he can watch her move. He knows she can tell exactly where he is, but she still keeps making little glances back, as if trying to divine his intent.

The expectation is building between them. He can feel an almost predatory glee in watching her, nervous and excited.

He waits til she's just started up the last flight of stairs, two steps up to cancel the difference in heights, then wraps an arm around her waist. He lifts her and spins her round, pinning her against the wall with her feet off the ground. Her arms go around his neck as he crushes his mouth to hers. She responds eagerly, tongue probing his mouth as her legs wrap round his waist, muscular thighs gripping hard. His hands slip down from her waist to cup her firm ass, squeezing as he broke away from the kiss, moving to bite her neck.

She moaned, pushing her hips at him with her back braced on the wall, her fingers in his short cropped hair.

His hand goes down her thigh and up under her skirts, firm fingers on her smooth skin of her thighs over her stocking tops.

She kisses his face, clinging on as he carries her up to the door.

She pulls a keycard from her clothes somewhere and slaps it onto the door lock, they tumble into the room.

He kicks the door closed.

There is an ice bucket on the side table. Steve has a sudden moment of clarity as he does a double take. How? Was someone watching them? They've seen no one coming up the stairs but the ice is fresh. No threats, return to the matter in hand. He takes the near empty bottle from Nat and Jams it into the ice.

Nat starts to fumble his shirt buttons undone, eager hands on the muscles of his chest. He tugs the black silk of the bow on her blouse, unravelling the knot and tossing it onto the bed. Impatiently she shrugs off the Cream silk blouse and presses her heaving chest to his, her breasts barely contained in the black lace of her bra.

He puts her down next to the bed and her hands go behind her, unzipping her skirts and letting them drop so she can step free of them. In front of her, Steve takes his time taking his shirt off, letting Natasha.. Natalia… devour his muscles with her eyes. She helps tug his plain white vest from his waistband, as he pulls that over his head she peppers his abs with kisses as she tugs his belt buckle open.

He puts one foot forward. "Undo my Boots"

She drops to her knees eagerly, fast fingers deftly unknotting her lace. She grips the boot heel as he steps out of the boot, and then pulls off his sock as well. She neatly rolls the sock and puts it into the boot and puts it aside. He moves his bare foot back and offers the other boot. "No hands. Untie it with your teeth"

She grins to herself as she slides her stocking clad legs wider apart, puts her hands behind her back and bows forward. Her sharp white teeth grip the cord, tugging at the knot. Looking down, Steve feels the thrill of power swell in him, watching the contrast of her pale skin and black lingerie, her stocking tops dark bands across her thighs, her ass bare and pale as the thin back of her thong near invisible as she moves, the muscles in her neck and back working as she tugs. His cocks a swollen hardness straining against his pants as he watches her defeat the knot, pulling his boot and sock off. He feels the soft press of her lips on the top of his bare foot as she kneels down and kisses his foot. Such a humbling gesture, but now he understands what she means about knowing something is true.

"Up, girl"

Nat jumps to her feet, eagerly back into Steve's arms. The sensation of naked skin on skin is electric, and she can feel his erection straining to be released. She rubs it as he kisses her neck again, longing to feel it inside her. He unclips her bra, pulling it away and freeing her breasts to his touch. Strong fingers explore her soft flesh, teasing her nipples already hard with desire. She presses herself to him, moaning softly "More. Harder. Please…" he grips firmly and tugs her nipple, making her give a wordless moan of pleasure.

He hooks his fingers into her thong and tugs it down, rubbing his hand up between her legs. She's soaking wet, slippery and swollen to his touch, parting eagerly to his questing fingers. She has to grip onto him as a shudder runs through her.

"Ready?"

"Yes Sir, very"

Steve pauses, mind running furiously. He could simply fuck her, just pin her down and slam into her, but he finds he wants more. Wants to push her, see how far this feeling goes. Research said safe words were used to stop things going too far, the traditional beginner's ones were the traffic lights of red / amber / green, but he felt that screaming RED was too close to her experiences with the Red Room, not something he wanted to call up while she was his to do with as he wanted. He needed something personal, unique to them, something powerful and humiliating that'll bind her closer to him.

Something from his military training all those years ago resurfaced. In case of encountering Russian troops they'd had a simple military phrase book, and one word fitted perfectly

"The Safe word is Poshchada" Poshchada – Mercy, Quarter, Surrender.

Her eyes go wide in surprise. "What? But?"

He picks up the black silk of her bow and grabs her wrists together in front of her. He repeats "The Safe Word is Poshchada. Do you understand?" as he twists the silk tightly round her wrists, jerking it to make sure it's tight.

"Yes Sir!"

He pushes her down onto the bed and she lies there, naked apart from stockings and garter belt, trapped like a deer in headlights as he finishes unfastening his pants and pulls them down, stepping free. His cock is huge, engorged and pulsing slowly in time with his steady measured heartbeat, a silver cord of precum trailing from the swollen tip. She licks her lips eagerly, lifting her bound wrists over her head

He rolls her over onto her belly and grips her bound wrists tightly.

"Legs apart" She spreads her legs open, allowing his wandering hand to stroke the insides of her thighs.

She writhes with pleasure as he strokes her swollen lips, parting them with his fingertips, stroking up and down from entrance to aching clit

"All night, the teasing, the flirting, we've been building up to this. You've been winding me up, pushing, wanting something more."

He slides a finger into her, making her gasp. She struggles against his grip, she should be able to slip the bonds with ease but he's holding them too tightly.

"You want to give in but you can't give, you need to be taken by force. It has to be done with power. With emotion. To connect."

He slides his finger from her wet heat and picks up his belt, doubling it over.

"What level are we playing on? You know, Right now I don't care. I'm doing this to prove to you that you are mine and to punish you for trying to manipulate me and make me do what you want."

He brings the belt down across her bare ass with a mighty crack of leather on skin. She cries out in shock, thrashing against his grip. Almost immediately a red strip appears across her pale ass.

He strikes again, almost perfectly parallel. Then a third, using the full swing of his arm.

Bright tears come to her eyes at the burning pain, her usual endurance training is to disassociate from her body, let it happen to someone else as she gets her task done but she's too emotionally engaged, too caught up in the moment. The helplessness and pain she feels are like a raw wound, she can't pull away as the strong hand on her bound wrist holds her down.

He settles into a steady rhythm, grunting a word between each stroke of the belt.

"You"

"Are"

"Mine!"

"You!"

"Are!"

"Mine!"

She gives a ragged sob and buries her head in the bedding.

He starts working the strap up the back of her legs, alternating left or right, starting by her knees and working up, the strap wrapping round to the sensitive, intimate skin inside her thighs.

"Say it!"

"You are Mine!"

"Say You are Mine. Surrender. Beg me for forgiveness. Beg me!"

The strap lashed across the sensitive fold where her ass met the top of her thigh and she cried out.

Still holding her down her laid aside the belt and pulled her head back by her hair. Her face was red from crying, eyes swollen and make up smeared. Her lip quivered as she looked at him with something like fear, something like longing.

"I see. You delight in resisting. The more you work for something the more value it has"

He slid his hand between her legs, two fingers easily sliding into her "But your body aches for me. Be honest with me, with yourself. You are Mine." He said as he slid them back and forth.

Eyes screwed closed she bit her lip but remained silent.

Determined, he picked up the belt again. He could feel her tense, ready for the assault. But her laid his hand on her back, stroking his hand gently down over her spine, tenderly across the red welts on her ass and thighs. She sobbed into the bed sheets, a guilt wracked and ugly sound as her whole body started to shake. He held her wrists firmly as he stroked between her legs again, tender caresses around her aching clit, tapping out a gentle rhythm. He could feel her tensing, muscles in her legs quivering as he stroked. She started panting into the bedsheets, so he slid a fingertip barely into her, moving in slow circles.

"Whose are you?"

Nothing but muttered sobs, then she wailed as he felt her throb, gripping his finger on the edge of orgasm. Grabbing up the belt he laid into her ass, a flurry of stinging blows that drove her further until she came, screaming "I'm yours! I'm Yours! I'm Yours, Master! Forgive me! Please! Please! I'm Yours!" amid an incoherent mess of wailing and sobbing.

Steve let go of her wrists. He'd had to push her further than he thought either of them could go, but he felt he'd finally found her. He got onto the bed, kneeling between her legs and made the belt into a loop.

He took her hips and pulled her back and up onto all fours, the head of his cock rubbing against her.

Dropping the belt over her head he pulled back, tightening it round her neck as he thrust forward.

She cried out in primal animalistic pleasure as he slid into her, right to the base. Both hands on her waist, one holding the belt tight, he started to thrust into her, her cries of pain and frustration now a joyful release as she pushed back onto him "Thank you! Thank you! I'm yours! Yours! Fuck me! Yes!"

It was like a dam breaking inside her, pain and rage and frustrations bottled up for far too long are set free.

He felt the tension build, his pelvis tense and balls tighten, the release so sudden and explosive it made the room spin. She slumped forward, pulsing in time as his orgasm drove her to come again.

He took a moment to catch his breath, his cock sliding from her. That was unlike anything he'd ever felt.

He looked down on the slumped body in front of him and jerked the belt leash.

"Lick me clean" he said, gesturing to his semi erect cock.

She crawled slowly to him, eyes downcast and started to lick and kiss his cock, tasting them both on his erection as it grew again. Reverently she opened her mouth and sucked him in, tongue stroking the underside. With her bound hands she stroked his tight clenched balls, tasting the last drops.

When he was satisfied he slumped back onto the bed and she crawled to his side. He took her in his arms and held her tenderly "That was amazing"

She kissed his chest and softly whispered "Thank you"

He petted her sweat and saliva matted hair "I don't know what came over me, I just followed my gut feeling."

She strokes his cock, already half-mast again and growing "you're a natural, you deserve to be in command"

"And you deserve to be commanded." He leans down and kisses her forehead. "I think i understand you a little more too. So I'll keep proving it to you, and making you show me whose you are. I'll make you a quivering mess of need any time i want. And I will fuck you whenever i need. And you'll love me for it"

"mmm…Yes Master!"

She rests her head on his chest and gives a satisfied sigh