Sandor Clegane X Reader : The Other Lannister Daughter

The Mountain who rides

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WARNING THIS CHAPTER INCLUDES A NON-CONCENTING SEXUAL SCENE THAT MAY BE INAPPROPRIATE FOR SOME VIEWERS
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As the evening sun set on the horizon, the three Lannister siblings, still quite drunk from the afternoon of heavy drinking said their goodnights and headed to their seperate chambers. (Y/n) began her climb up the large spiraling staircase that led to her quarters which was currently quite a difficult feat as her head was pounding and her mind became lost in a fog.
Paying little to no heed to her surroundings and concentrating on the wall that she was using for support, she had made it most of the way to her room when she suddenly slammed into what felt like a metal door, the impact causing her to stumble backwards a few steps in an effort to keep herself from falling. A gruff chuckle came from above causing (y/n) to finally glance up and in doing so found not a metal door but Gregor Clegane.
She began to sputter out an apology but was silenced by a single wave of a large gauntleted hand. She gave a small curtsy in reply before she pressed herself against the wall and tried to slip past the giant though he remained still, his eyes following her every movement.
Just as she had completely passed him and began to feel a little relieved that the situation was now over when his hand reached out and grasped ahold of her hair. She let out a cry as he pulled her head sharply back, forcing her to look towards him. Opening her mouth to begin giving him a piece of her mind, she was suddenly pushed hard against the wall, his free hand beginning to grab and tear at her garments.
The fog began to clear at once and
(y/n) beginning to realize exactly what was happening began to scream at him. "Get your filthy paws off me Gregor, how dare you treat me like th.." but was cut off as a fist made contact with her left jaw. Blow after blow came down on her, sobs and whimpers of pain emmitted as his gauntlets stabbed into her time and time again.
After a moment, he stopped and she began to hope that whatever game he was at was done, little did she know he was just getting started.
She pushed herself off the ground, preparing herself to make a run for it when his boot slammed down on her chest, the sickly crunch of bones filling the corridor. It became exceedingly hard to breath and inklike blobs begain to cloud her vision as his rough hands began to tear the fabric of her tunic off of her, the air biting into her uncovered skin. His hands pinched and prodded her exposed body, his weathered hands a painful contrast to her soft and tender flesh. As he ripped the remaining fabric off and began to remove his trousers, (y/n) used the last remaining energy she had left to unsheath the blade she had concealed in the lining of her boots.
As he lowered himself before her,  grabbing her ankles to prying her legs apart and pulled her body closer towards him. As he pulled her closer, she used the movement to direct her and began to swing the blade wildly at him, unable to see but trying desperately to stop him. A rumble of laughter, and then suddenly an  unbearable pain erupted through her as he buried himself inside her, ripping and tearing her flesh as he did. He had just began to thrust when suddenly her knife sank deep into his shoulder but instead of stopping he began to thrust harder, wrapping his hands around her throat.
She sobbed as she lay there trying desperately to breath, knowing that she was now completely powerless to stop the attack and that he held her life in his hands. Gregor began to grunt, his strokes becoming more frantic as he approached release. He lowered his face so his lips where just above her ear,
" After this, your father has no right to refuse my proposal. You'll be mine before the end of the month, I'll see to that." The words where salt in the wounds but exactly what she needed in that moment, a twisted encouragement that drove her past the pain and drove her to act. Her hand, searching for the knife handle instead found the hilt of his discarded sword. Gregor's breathing was becoming laborious and she knew it was now or never. Pulling the sword from its sheath as quickly and quietly as she could and brought the blade across his chest in a short slash, a large gouge forming as she began to grow momentum, slicing and driving him off and way from her.
Gasping for air, she leaned against the wall for support and attempted to flee, he abruptly sat up and began to grab for her when a burst of  adrenaline kicked in, propelling her forward up the remaining steps and she slid into her room,barricading the door once inside and standing alert nearby, his sword still grasped tightly in her hands.

Though she received quite a few curious glances on account of her wounds and numerous prying questions, until the day she died, she never spoke a word of what had happened that dreadful night but swore a silent oath that one day she would get her revenge on the bastard.

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Days later, the royal wedding day had arrived and after the beautiful but rather extravagant wedding at the Septem of Balor, the wedding feast had commenced and everyone who was anyone was in attendance.
(Y/n) sat beside her younger brother and Sansa, trying her best to fein happiness but ignoring most of the festivities,lost in her own thoughts and trying her best to avoid Gregors gaze.
It isn't until Joffrey had fallen to the ground and the blood had begun to drip from his eyes that she began to pay attention as shouts from Tyrion, Cerci and the guards fill the air and quickly grasping the severity of the situation she jumped into action, grabbing the shaking Sansa and leading her away from the commotion; knowing that the traitors daughter would be the most likely suspect and fearing for the girls life. She ran,dragging Sansa and only stopping once they had reached the docks, where Sansa hesitantly admitted to her that Littlefinger had previouly offered her an escape and had a ship ready to sail currently docked nearby and lead her to it. Sansa begged (y/n) to come with her but knew what the answer would be before the question had even formed. (Y/n) stood on the edge of the pier, waving them off until the ship disappeared on the horizon.

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After returning to the Red Keep, she found that in the confusion that had conspired after Joffreys abrupt death Tyrion had been imprisoned and was being held responsible for the act by Cerci. She immediately headed for the  dungeon cell in which he was being held,bring him food and water knowing Cersei would have forebode it. Podrick was sleeping against the heavy oak door and she had to gently nudge him aside to slip past.
In a dark corner of the dank and filthy room, her darling little brother sat muttering to himself but once he noticed her, his face and spirits lifted. She told him of Sansas fate as he ate and drunk his fill before updating her on the big moments both during the ceremony and after that she had missed. She was distraught that their father had not intervened but Tyrion made her promise to stay away from the trial and to keep her thoughts on the matter to herself,not share them with father as it was guaranteed to make things worse. She agreed but little did he know that she was beginning to plan out their escape of the city and ultimately Westeros.