Thank you to KuroEngel_OG for the inspiration.

There is an old saying that goes 'still waters run deep'. That, and it is always the quiet ones that you have to watch; yet (Y/n) had not really believed any of that until she had met a certain old soldier by the name of Steven Grant Rogers. The man, as well as becoming an Avenger, opening up something to her, that she had never thought she would experience; not only the honour of finding herself among their ranks, as well as being able to call the earth's greatest heroes her friends. But also able to see a side of the famous Captain America that he had confessed no one else had seen before. To experience things with him, that he had never felt capable of showing before. To finally be the dom that he had always desired to be, once he found the perfect sub; and according to Steve, she was just that. (Y/n) not knowing that she needed it, that she wanted to be dominated, until that first night he had punished her for being a bad girl. Until he had stripped and bound her to his bed. Until her backside had stung from him smacking it, and his hand had gripped at her throat as he had taken her. Until stars had appeared before her eyes, and she had thanked God for the pleasure that filled her body.

She doubted that anyone, even Bucky, would believe her if she told them; that in fact they might even laugh at her if she were ever to let it slip what her daddy liked to do to her when they were alone; of the little toys and playthings that were hidden away in his seemingly ordinary room. (Y/n) believing that Tony, in particular, would find it impossible to imagine that the star-spangled boy scout could be interested in anything that was spicier than the missionary position. But oh, would he be wrong; she sure that despite his playboy image, there was actually a few things that the captain might just be able to teach the old tin can when it came to pleasuring a woman.

"Where is she............?" The mere sound of his concerned voice from down the corridor, sending an exquisite shiver down her spine.

Before he had gone away on his latest mission with Bucky and Sam, Steve had told her to be careful while she was out with Clint and Nat. That he didn't want any harm to come to her. And although she had promised; although she had done her best to make sure that she got back without so much as a scratch, being an Avenger was not something that went hand in hand with remaining unharmed. It a last minute incident, as she and the two agents made their way out of the Hydra safe house, that had led to her need to see Bruce. (Y/n) hoping that the few cuts would have more or less healed before Steve got back, and then he wouldn't be worried. But as he threw open the door to the medical bay; his eyes wide as he saw Bruce caring for her, she knew that fate had other plans. And that his concern, would manifest itself into a night of him showing her how much he loved her and cared, in the way that they did best. Her heart beating frantically as he came to her side and dropped to his knees.

"Are you alright........?" Steve asked as he took her hand. The look in his eyes making her bite at her lip, as she slowly nodded her head.

"She's fine, Steve. I had to put a few stitches in a cut to her head, but other than that, its nothing more than a few cuts and bruises." Bruce explained with a smile. The doctor seeming to miss the gaze that passed between the two, as he got to his feet.

"In fact, you can take her to her room if you like........." Steve not needing to be told twice; the captain helping her to her feet, before quickly leaving the room.

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"Strip.........." The word leaving his mouth as soon as the door closed behind them. (Y/n) instantly doing as she was told; her clothes dropping to the floor. Steve walking around her, scrutinising every part of her, to make sure that Bruce hadn't missed anything. The captain gripping at her chin, and looking at the scar on her head.

"I told you to be careful............" His voice deeper, darker, more dangerous than it usually would be. His worried look, now more evidently tinged with a hunger that came from them being away from one another for a few days.

"And I was.....I promise, daddy. There was an explosion when we made our way out of the safe house, and I got caught by some glass........." She knowing that it was best to not talk back; that the punishment would now last all evening. That he would not allow her to cum until he was satisfied; but she had to make him see that she had been being good. That she had obeyed his orders.

"And were Clint and Nat hurt.........?" The question resulting in a shake of her head.

"Please daddy, I was good. I did as you said. Don't make me have to wait. I swear I will make it up to you. That I will do anything you want.........."

"Anything...........?" Steve interrupted. His eyes now blown with lust, as he looked down at her. A groan passing his lips, as he let his fingers move over her hardened nipples, and he saw her shiver while she nodded. (Y/n) whimpering as he removed his fingertips from her body and slowly made his way over to the chest of draw, taking out some of his favourite toys before moving to large sofa; the captain taking a seat and gesturing to his lap. (Y/n) not needing him to say anything, before she made her way over to him and draped herself across his legs; her fingers gripping at the nearest cushion as the sound of the first slap to her backside filled the room. She crying out, as two of his fingers made their way inside her. Steve smiling as his hand was instantly covered in her arousal. (Y/n) already squirming and moaning as he pleasured and punished her with both his hands. She screaming for him, calling for him to love her, to discipline her. The two happy to give one another what they wanted, what they needed. One wanting to be dominated; the other, to be obeyed. The captain looking forward to the rest of the night; to her doing everything that he wanted, until it was time to allow her to cum. But before then, he was more than happy to show her just how deep his waters could be.