Varys, Lysa Arryn née Tully, and Petyr Baelish or rather their own individual machinations caused the rebellion and all that followed.
Lysa Arryn née Tully had bonded with his Lyanna in Harrenhal over their mutual dislike of Catelyn, or so his mother had believed. Lysa was spiteful and jealous. Lyanna's beauty reminding her of Catelyn's, and so she decided they were the same and hid her feelings behind false smiles, kind words, and a dreamy expression. Lyanna had simply believed her to be somewhat naïve and somewhat simple, she had no idea what her 'friend' truly felt for her.
They watched as Lyanna handed Lysa letters for her father, Lord Rickard Stark and her eldest brother, Brandon. They watched as Lyanna shared hugs and tears of farewell with her before leaving Riverrun to 'continue' her journey North only to be meet with Rhaegar. They watched as the two lovers and a half dozen knights rode off. They watched as the two exchanged vows and turned away when they made love. The ten and two years olds blushing and glancing at each other from the corner of their eyes. And so, Lyanna and Rhaegar hid away celebrating their marriage unaware of the damage they wrought with their secrets and placing their trust in those unworthy of it.
They watched as Lysa met with Baelish in secret. They were disgusted even further when they realized Baelish's obsession with Catelyn and his manipulation of Lysa. They were disgusted by the sight of them bedding. It was one such vision that showed them their actions. Lysa told Petyr of the letters Lyanna had given her. She complained of how the horrid and 'beastly looking' Stark girl had all but demanded she pass them on as though she were some servant to be commanded. Lysa spoke of how she had no intention of ever sending them and if they were so important then the wolf bitch should have spoken to her father and brother herself instead of writing letters that could so easily disappear.
Petyr asked if she still had the letters and if he could look them over. Lysa had merely smiled before moving to rise from the bed, clearly naked, and so Nephyra quickly covered Jon's eyes. Oh, how she wished she had done the same as she saw the then young woman's already sagging breasts and thickly haired center. She knew there were no bras in this world and so she truly could not help but wonder how they had appeared to be so highly set when she was clothed before determining she must use a wrap of some kind. She watched as Lysa grabbed the letters from behind a loose stone in the far wall of her chamber's before returning to the bed and under the cloth blankets.
Petyr read opened and read the letters, taking in their contents. He smirked and Lysa questioned him with furrowed brows. Petyr tell her they will be joining the game and if they play well all their dreams would come true.
Lysa speaks of her dreams. She speaks of how they shall marry and have a castle in which they will fill with children. Once Petyr is sure she sleeps he speaks of his own. He speaks to himself of having Catelyn Tully in his bed or much like her sister on her knees as he uses her mouth as his sword's sheath. He speaks of plans to gather funds and build an army. He speaks of those that stand in his way and how he could ensure their deaths. He speaks of a crown atop his head and his beautiful red-haired queen-to-be.
When Lysa mumbles and wakes just slightly, turning onto her belly Petyr appears annoyed but quickly moves to spread her legs and push her onto her knees. He tells her to relax as he shoves away the blankets giving them both an eyeful of the lovers' bodies before either could fully react.
"Is that why he is called little finger?" She asks looking up at Jon with a far too innocent look that immediately sends him into a burst of laughter despite the seriousness of it all.
WARNING: GRAPHIC VIOLENCE AND ABUSE/MURDER/RAPE (RHAENYS, AEGON, ELIA)
Varys had his 'little birds' watching, spying on them, and knew of Rhaegar's plans to take Lyanna as his second wife. He stole Rhaegar's letters to Rhaella and Elia. Each letter contained orders for them to leave for Dragonstone and Dorne with his brother and their children. Elia's also containing a copy of papers annulling their marriage and his wishes for her to be with the one she loves as he now is. He burnt the letters before even Pycelle could learn of them and inform Tywin. He had his 'birds spread rumors of his stealing Lyanna. And as he did he sent word to Illyrio Mopatis, whose own babe was the last of the Blackfyre line along with Varys, himself.
They watched as he plotted. They watched as he whispered into Aerys' ear of keeping Elia and her children locked within Maegor's Holdfast. They watched as he watched young Aegon and had one of his bird's make his portrait, a portrait sent to Mopatis. They watched the Sacking and how Varys made sure that Pycelle had every opportunity to ensure the Lannister's entered the Keep. Varys whispered into Aerys ear of his allies arriving and so began the Sacking of King's Landing. And when he left Aerys, they watched as he ensured that not a single Targaryen or Martell loyalists remained to guard Elia and her children by having them placed elsewhere if not killed by his 'birds'.
They watched as Amory Lynch dragged sweet little Rhaenys out from her father's bed by her legs and when the poor girl screamed out her terror, when she kicked out at him he grabbed her by the hair to pull her out the rest of the way.
He did not care for her age. He did not care for her tears nor her screams. He did not care for how Balerion, her cat, jumped out at him and clawed at his face only for him to throw the cat out the open window. Lynch had shaken her commanding she be silent and when her cries did not end he cut out her tongue before using his blade to stab at the girl's little body. 68. That was the number of times he stabbed her. She was barely three and she was dead. She died choking on her blood as he stabbed her again and again. Her broken cries, the distorted screams of pain, and gurgling as she choked would never leave them.
They watched as Gregor Clegane stormed into the royal nursery. He was a gruesome sight. His large and armored 8 foot frame covered in the blood of those he killed on his way to them. He smiled cruelly as Elia tried to reach Aegon. Her pleas falling on deaf ears. He tossed her aside sending her flying back. The loud crack of bone breaking was heard as her lower body collided against a column. Clegane swore that if she could make her way to him he would spare her son. She struggled to raise herself from her awful landing regardless of her clearly broken leg as Clegane laughed. They saw as despite her pain she used the very column she collided with to lift herself up only to fall screaming out her pain when she tried to move forward only to collapse.
He mocked her and spoke of how she could not possibly love her babe if she would not come to him as she dragged herself forward, crying and reaching out for her babe. They watched as he lifted Aegon, a babe of a little over a year, by his head. His hand squeezing until it burst before throwing what remained of the babe's body at the wall. Elia's screams of agony ringing throughout the chambers. Clegane reveled in her screams and then her whimpers. Her dulled glistening eyes locked upon where her little Aegon had landed.
He mentioned the beauty of her pain and how he wanted more. He spoke of how a woman was no more beautiful then when she was releasing screams of torture. He told her that her pain hardened him as he moved towards her. He grabbed hold of her by her hair and dragged her to the bed, throwing her upon it. He ripped at the top of her dress revealing her breasts and used his sword to cut at her skirts. Her hands came up with a small blade that was hidden within the folds of where her corset met her skirt stabbing at his hands and arms as best she could, fighting him off, only for his own open hand to fly across her face disorienting her, throwing the blade away from them, and flipping her so that she faced the bed.
He unlaced his trousers and he waited for her to refocus as he placed himself at her entrance. He wanted her to be fully aware of the pleasure he'd be taking from her and the pleasure her pain would give. And he did. Elia had screamed and fought as best she could when he thrusted into her body, ripping at her from within. Her screams horrified them both. Nephyra clung to Jon, burying her face into his chest as her body shook in terror. Jon however could not look away. His eyes were locked upon Elia's face twisted in pain and horror but still calling for help. Disgust and despair. And as Clegane's thrusts began to stutter and his seed was released within her womb, emptiness. Clegane slit her throat, ear to ear, when she no longer responded to him.
And so Jon felt hatred fill his heart for the first time.