This is a request for Asher-Crimson-Viper. Hopefully its ok 😉 Enjoy

For Varys and Littlefinger, the manoeuvrings of the great and noble families of Westeros were like their own personal game of chess. Even though the great and good thought that they were in control of their world, the real puppet masters were the Master of Whispers, and the Master of Coin.

Each man played the game from the shadows, constantly trying to outmanoeuvre the other, placing their pieces strategically in an attempt to bring down their rival.

The two men had very different reasons for playing the game; Littlefinger played the dark side of the board, playing for personal gain, upward mobility was all that mattered, upward mobility at any price through the rejection of all religious and moral principles. Petyr would use anyone and anything to gain position and wealth.

Varys on the other hand never sought power or position for himself, and unlike Littlefinger, he desired the strengthening of social institutions, not their slow destruction. To many, he would be seen as the light side of the game, a more altruistic being; but that said, he was just as determined to bring down his opponent as Petyr was.

To Varys annoyance, Petyr seemed to have been getting the upper hand in their little game recently, and he had been looking for any way possible to regain the advantage over the despicable Baelish.

He had done all he could to find the ultimate weapon against Petyr, the ultimate chess piece that could, if not bring his rival down, could at least distract him.

No matter what he did, Varys seemed to draw a blank; but that was until he received word from the place where Petyr was born. Most believed that Petyr was the only Baelish; but from the information that Varys received, there was in fact another, a younger sister who had remained in the peninsula, the one and only link that Petyr had to his homeland. But it wasn't just the knowledge that Petyr had a sister that made the usually quiet man smile, it was the knowledge of what the two siblings had been to one another.

Their parents had passed away when they were young, leaving the two fledgling mockingbirds alone with only one another for comfort, and that was what Petyr had appeared to have found, not only in his sister's arms, but also in her bed.

According to Varys information, rumours about the relationship between the two Baelish had been around for a very long time in the Fingers, but no one had ever dared question or condemn the two. Varys had found out that, unlike her Machiavellian brother, his sister (Y/n), was a good and kind woman, who would always do her best to help the people of her homeland; from what the Master of Whispers could garner, (Y/n) Baelish was as dangerously intelligent as her older sibling, but unlike Petyr, she had no desire for power or wealth, preferring what sounded like a simple life.

The two siblings seemed to have only parted ways once Petyr had become obsessed with Catelyn Tully; but from correspondence that Varys' spies had been able to intercept, it was obvious that Petyr still cared a great deal for his sister, ensuring that she was well taken care of, and even though the correspondence seemed to be one sided, Petyr appeared to write frequently, showing a rare softness to his usual cruel character.

Varys decided that it was about time that this ultimate chess piece should be brought into play, and he had sent word inviting Lady Baelish to the capital, ensuring that the woman's appearance should coincide with a celebration which the King had ordered; and much to Varys joy, the younger Baelish had accepted, and now he stood in the courtyard waiting for her to arrive.

Varys was shocked to see a younger woman, clothed in a simple peasant's dress, accompanied by only two armed men arrive without fanfare or ceremony; Varys was also shocked by her appearance. The woman was quiet a rare beauty, a beauty that even Varys found himself appreciating, she did not need the trappings of wealth, no expensive gown or sparkling jewellery to accentuate her natural glow, there just seemed something about the dark haired woman that was almost perfect.

"Lord Varys?" The smiling woman asked, as she was lowered from her horse by one of the guards.

Varys nodded. "Yes, and you must be Lady Baelish, it is a pleasure to meet you finally, I am so glad that you could come for the celebration and I am sure that your brother will be delighted to see you." Varys said, taking the younger woman's hand.

"Actually, I am sure that my presence here will be a shock to Petyr; I haven't seen or spoken to him in many years, to be truthful, I am not quite sure why I accepted your invitation." (Y/n) told him, making Varys momentarily question his thoughts that she could be a weapon against Littlefinger.

"We were very close once you see, but then someone came between us, and well....... well, I suppose that was a long time ago, maybe it's time that we were family again." (Y/n) told Varys, as he led her through the Keep to rooms that he had organised for her.

"I hope that you don't mind, but I have been able to find you something to wear which should be suitable for tonight's celebration." Vary told her, motioning to an elaborate gown that had been place across the bed.

"I would also consider it an honour if you would be my guest." Varys said, watching as (Y/n) held the gown up against her body.

He had ensured that the gown was just revealing enough to attract the attention of not only Petyr, but also any other man that may be present at the evening's events. Varys had read Petyr's letters to his sister, and it was obvious that his rivals feelings towards her were still anything but platonic, and Varys was going to do anything, and everything to make sure that Petyr could think of nothing other than the beauty that stood before him.

"Thank you, Lord Varys, I would be delighted to accompany you." (Y/n) said, gracing him with a smile, as he quietly left her room.

                                                               >>------------------------------<<

Petyr stood watching the Lords and Ladies mill around the great hall, and he couldn't help but smile as he took a sip of his Dornish wine, as he imagined all the players as his individual chess pieces. Robert and Cersei sat on their thrones, and Ned stood near the King, as his daughters, and the Lannister's mingled with the gentry of lesser Houses, acting as though they owned the world. To Petyr though they were all pawns, something to be used and disposed of when they had outlived their usefulness, they were his way to power, and nothing, not even his rival in the game was going to get in his way.

As the doors of the hall opened, Petyr noticed that the Master of Whispers was accompanied by a woman, and Petyr couldn't help but chuckle at the idea of the eunuch bringing a lady to the celebration; but his chuckle changed to shock as his eyes finally took in the features of the woman that held on to Varys arm, it had been many years since he had seen her, but he could never forget that face, and she was more beautiful than he remembered.

For a moment Petyr found that he was unable to move as he took in the sight before him, his sister was dressed in a dark blue gown, the bodice plunging just enough to make Petyr begin to sweat as he remembered how his sister's body used to make him feel, his blood boiling as he saw the eyes of the other men in the room mentally undress the woman by Varys side.

With a deep breath, Petyr made his way over to Varys and his sister; he knew that Varys had found a new and important player in their game, but for once his mind was not focused on the ulterior motives of his rival, but on the woman that he had desperately missed.

"Lord Varys, such a pleasure to see you." Petyr hummed, his eyes never leaving (Y/n), as Varys turned to greet his opponent.

"Ah, Lord Baelish, the pleasure as always is mine. You of course know (Y/n)." Varys said, as Petyr took (Y/n)'s hand and kissed her knuckles.

"How very clever of you to find my little sister; I didn't know your friends extended all the way to the Fingers." Petyr said, pulling his sister in close.

"You would be surprised at my reach Lord Baelish, now if you will excuse me, I must go speak to lord Tyrion." Varys said with a grin, as he left the two siblings together.

"I see your true loves husband is now the Hand of the King, which can only mean that Catelyn is here. You must be very happy about that." (Y/n) said slightly harshly, as she pulled away from him.

"(Y/n) please, not after all these years. Did you read none of my letters? I have apologised so many times, I have wanted you to come and join me for so long, yet it takes a message from my rival to get you here. You know that he has bought you here so that he can use you against me; don't be fooled by his demeanour, he is a cunning, and devious man." Petyr said, trying to keep his voice as low and calm as possible, even though the nearness of his sisters' body was driving the usually controlled man, insane.

"Are you that scared that I would embarrass you in front of the woman you love that you will accuse Varys of such a thing? If you wish me not to be here, then I will leave." (Y/n) told Petyr, pulling herself away from him, and making her way back to the door.

Varys watched the siblings from afar, nodding to one of his spies to follow the pair as they left the hall.

As (Y/n) picked up her skirts and made her way quickly back to the chamber, she was suddenly grabbed by the arm and pulled into an empty room, the door being locked behind her.

Within an instance, Petyr had her pressed up against the wall, his lips roughly kissing her neck, as he fumbled with the strings on her bodice, desperate to get at the supple flesh underneath.

"You will not be leaving me ever again (Y/n), you will stay with me, and I will have all of you. Your body belongs to me, to do with as I wish; if you love me as you used to,  I will give you everything that you desire." Petyr growled, as his tongue circled her hardened nipples, his arms picking her up so that her legs were around his waist, his hands pulling at the laces on his breeches before he brutally entered her body.

Her flesh felt like home, so familiar yet so new; the feeling of being inside his sister was as amazing as he remembered, and he couldn't help but smile as (Y/n) began to moan, pulling on his hair as he thrust into her again and again.

"I am yours Petyr, I have always been yours. Just love me, and I will be yours again." (Y/n) purred as Petyr carried her over to a table and dropped her down, pushing her skirt away so that he could watch himself take what was his.

Varys watched the unfolding scene from one of his many vantage points, his spy having informed his master of the whereabouts of the two Baelish.

A subtle smile came to his lips as he watched Petyr surrender to the beauty beneath him; he had finally found his rivals weakness, he had found the secret that Petyr would do anything to keep quiet; he had found the ultimate chess piece to use against his enemy, and finally Varys felt as though he truly had the upper hand.