Isso é devido a algumas decisões misteriosas em parte da equipe do Show.
Nos livros, não aconteceu exatamente assim e porque o Show optou por ignorar todo o episódio sobre:
Tysha
Então, naturalmente, a reação de Tyrion não faz sentido para um fã de programa. Além disso, ele pegou um punhal e uma besta dos aposentos do pai.
Vamos ver como as coisas aconteceram nos livros. Spoilers além deste ponto.
Esposa de Tyrion
Quando Tyrion era um adolescente, ele e Jaime cavalgavam de Casterly Rock quando encontraram alguns estupradores perseguindo uma jovem. Os estupradores fugiram quando viram Jaime, mas Jaime não ficou satisfeito. Ofendia-o que os rufiões atacassem viajantes inocentes tão perto de Casterly Rock. Então ele voltou para buscar ajuda e deixou a menina aos cuidados de Tyrion.
Tyrion levou-a para uma estalagem e descobriu que a garota se chamava Tysha e era filha de um crofter que estava a caminho de lugar nenhum, na verdade, como seu pai havia morrido e ela não tinha família imediata. Tyrion a alimentou, consolou-a e, antes que eles percebessem, estavam dividindo a cama. Tyrion lembra que ela era muito adorável. Ela era virgem e pela manhã, Tyrion estava apaixonado por ela.Tyrion se casou com ela subornando um septon bêbado. Mas ele sabia muito bem que seu pai nunca aceitaria a filha de Crofter como sua nora, casada com o segundo na linha do trono dos antigos Reis da Rocha. Então ele encontrou um caminho, mas não funcionou muito bem. Ele a colocou em um chalé e eles brincaram de ser marido e mulher por algumas semanas até que o Septon que ele havia subornado para se casar com eles dissesse a Lorde Tywin.
Então Tywin o esmagou. Ele fez Jaime confessar que ele havia contratado uma prostituta virgem para fazer um homem fora de Tyrion. Então ele a entregou a sua guarnição e ofereceu a Tyrion para assistir. Então ele pediu que Tyrion a levasse também.
Tyrion odiava seu pai por isso. Mas tudo fez sentido, certo? Ele só tinha que olhar para si mesmo. Por que uma garota como Tysha gostaria de estar com um anão horrível e mal formado como ele?
Para uma conta completa, leia AGOT Tyrion VI.
Confissão de Jaime
Antes de libertar Tyrion, Jaime confessou que Tysha não era uma prostituta, ela era apenas uma garota de baixo nascimento que eles conheceram. Tyrion estava agora consumido pela raiva e culpa, sua própria família o havia enganado e ele mesmo participou de estuprar sua esposa e um amor verdadeiro.
"Tysha?" His stomach tightened. "What of her?"
"She was no whore. I never bought her for you. That was a lie that Father commanded me to tell. Tysha was . . . she was what she seemed to be. A crofter's daughter, chance met on the road."
Tyrion could hear the faint sound of his own breath whistling hollowly through the scar of his nose. Jaime could not meet his eyes. Tysha. He tried to remember what she had looked like. A girl, she was only a girl, no older than Sansa. "My wife," he croaked. "She wed me."
"For your gold, Father said. She was lowborn, you were a Lannister of Casterly Rock. All she wanted was the gold, which made her no different from a whore, so . . . so it would not be a lie, not truly, and . . . he said that you required a sharp lesson. That you would learn from it, and thank me later . . ."
"Thank you?" Tyrion's voice was choked. "He gave her to his guards. A barracks full of guards. He made me . . . watch." Aye, and more than watch. I took her too . . . my wife . . .
"I never knew he would do that. You must believe me."
"Oh, must I?" Tyrion snarled. "Why should I believe you about anything, ever? She was my wife!"
“Tyrion –it...”
He hit him. It was a slap, backhanded, but he put all his strength into it, all his fear, all his rage, all his pain. Jaime was squatting, unbalanced. The blow sent him tumbling backward to the floor. “I... I suppose I earned that.”
"Oh, you've earned more than that, Jaime. You and my sweet sister and our loving father, yes, I can't begin to tell you what you've earned. But you'll have it, that I swear to you. A Lannister always pays his debts." Tyrion waddled away, almost stumbling over the turnkey again in his haste. Before he had gone a dozen yards, he bumped up against an iron gate that closed the passage. Oh, gods. It was all he could do not to scream.
ASOS - Tyrion IX
Ele mentiu sobre matar Joffrey para machucar Jaime. Ele também contou sobre a infidelidade de Cersei e depois seguiu seu caminho.
Jaime handed him the ring of keys. “I gave you the truth. You owe me the same. Did you do it? Did you kill him?”
The question was another knife, twisting in his guts. “Are you sure you want to know?” asked Tyrion. “Joffrey would have been a worse king than Aerys ever was. He stole his father’s dagger and gave it to a footpad to slit the throat of Brandon Stark, did you know that?”
“I... I thought he might have.”
“Well, a son takes after his father. Joff would have killed me as well, once he came into his power. For the crime of being short and ugly, of which I am so conspicuously guilty.”
“You have not answered my question.”
“You poor stupid blind crippled fool. Must I spell every little thing out for you? Very well. Cersei is a lying whore, she’s been fucking Lancel and Osmund Kettleblack and probably Moon Boy for all I know. And I am the monster they all say I am. Yes, I killed your vile son.” He made himself grin. It must have been a hideous sight to see, there in the torchlit gloom.
ASOS - Tyrion IX
Ele conheceu Varys nos túneis. Foi quando ele percebeu que Shae falou sobre esses túneis que se abriam diretamente nas câmaras da Mão, dado como Varys costumava contrabandear ela dentro da força de Maegor.
Ele disse a Varys que ele não se importava nem um pouco com sua vida ou com qualquer outra pessoa neste momento. Apesar dos avisos de Varys, Tyrion fez com que ele lhe contasse a entrada secreta dos aposentos de seu pai.
Lá encontrou Shae na cama de Tywin Lannister, o homem que desprezou publicamente Whores e Whoremongers. Shae se vendeu para Cersei para ver Tyrion enforcado e teve a brilhante idéia de chamá-lo de "Meu Gigante de Lannister" naquela época, e morreu por isso.The juncture was otherwise empty, but on the floor was a mosaic of a three-headed dragon wrought in red and black tiles. Something niggled at Tyrion for a moment. Then it came to him. This is the place Shae told me of, when Varys first led her to my bed. “We are below the Tower of the Hand.”
“Yes.” Frozen hinges screamed in protest as Varys pulled open a long closed door. Flakes of rust drifted to the floor. “This will take us out to the river.” Tyrion walked slowly to the ladder, ran his hand across the lowest rung. “This will take me up to my bedchamber.”
“Your lord father’s bedchamber now.”
He looked up the shaft. “How far must I climb?”
“My lord, you are too weak for such follies, and there is besides no time. We must go.”
“I have business above. How far?”
“Two hundred and thirty rungs, but whatever you intend-”
“Two hundred and thirty rungs, and then?”
“The tunnel to the left, but hear me -”
“How far along to the bedchamber?” Tyrion lifted a foot to the lowest rung of the ladder. “No more than sixty feet. Keep one hand on the wall as you go. You will feel the doors. The bedchamber is the third.” He sighed. “This is folly, my lord. Your brother has given you your life back. Would you cast it away, and mine with it?”
“Varys, the only thing I value less than my life just now is yours. Wait for me here.” He turned his back on the eunuch and began to climb, counting silently as he went.
ASOS - Tyrion IX
“M’lord?” a woman’s voice called.
That might have hurt me once, when I still felt pain. The first step was the hardest. When he reached the bed Tyrion pulled the draperies aside and there she was, turning toward him with a sleepy smile on her lips. It died when she saw him. She pulled the blankets up to her chin, as if that would protect her. “Were you expecting someone taller, sweetling?”
Big wet tears filled her eyes. “I never meant those things I said, the queen made me. Please. Your father frightens me so.” She sat up, letting the blanket slide down to her lap. Beneath it she was naked, but for the chain about her throat. A chain of linked golden hands, each holding the next.
“My lady Shae,” Tyrion said softly. “All the time I sat in the black cell waiting to die, I kept remembering how beautiful you were. in silk or roughspun or nothing at all...”
“M’lord will be back soon. You should go, or... did you come to take me away?”
“Did you ever like it?” He cupped her cheek, remembering all the times he had done this before. All the times he’d slid his hands around her waist, squeezed her small firm breasts, stroked her short dark hair, touched her lips, her cheeks, her ears. All the times he had opened her with a finger to probe her secret sweetness and make her moan. “Did you ever like my touch?”
“More than anything,” she said, “my giant of Lannister.”
That was the worst thing you could have said, sweetling.
ASOS - Tyrion IX
Então ele pegou as armas:
Afterward he found Lord Tywin’s dagger on the bedside table and shoved it through his belt. A lion-headed mace, a poleaxe, and a crossbow had been hung on the walls. The poleaxe would be clumsy to wield inside a castle, and the mace was too high to reach, but a large wood-and-iron chest had been placed against the wall directly under the crossbow. He climbed up, pulled down the bow and a leather quiver packed with quarrels, jammed a foot into the stirrup, and pushed down until the bowstring cocked. Then he slipped a bolt into the notch.
ASOS - Tyrion IX
Então Tyrion encontrou seu pai e perguntou onde Tysha estava. Tywin a chamou de prostituta. Tyrion o advertiu contra usar essa palavra. Tywin fez isso de novo. Tyrion atirou nele e depois saiu.
“We can talk here just as well. Perhaps I don’t choose to go to the Wall, Father. It’s bloody cold up there, and I believe I’ve had enough coldness from you. So just tell me something, and I’ll be on my way. One simple question, you owe me that much.”
“I owe you nothing.”
“You’ve given me less than that, all my life, but you’ll give me this. What did you do with Tysha?”
“Tysha?”
He does not even remember her name. “The girl I married.”
“Oh, yes. Your first whore.”
Tyrion took aim at his father’s chest. “The next time you say that word, I’ll kill you.”
“You do not have the courage.”
“Shall we find out? It’s a short word, and it seems to come so easily to your lips.” Tyrion gestured impatiently with the bow. “Tysha. What did you do with her, after my little lesson?”
“I don’t recall.”
“Try harder. Did you have her killed?”
His father pursed his lips. “There was no reason for that, she’d learned her place... and had been well paid for her day’s work, I seem to recall. I suppose the steward sent her on her way. I never thought to inquire.”
“On her way where?”
“Wherever whores go.”
Tyrion’s finger clenched. The crossbow whanged just as Lord Tywin started to rise. The bolt slammed into him above the groin and he sat back down with a grunt.
ASOS - Tyrion IX
Então agora você entende, por que Tyrion fez isso? Foi um trauma emocional, raiva e culpa que o levou a fazer o que ele fez. As pessoas tendem a agir de forma imprudente em tais circunstâncias.