Jaime said at once, "Someone is trying to harm us."
Tywin swept his gaze over them. "If they only wanted you dead, sending the letter straight to Robert would have sufficed. Three letters, three different methods, all with one purpose: to force me to reach King's Landing as quickly as possible and use my hand to kill Robert, severing all ties between Lannister and Baratheon and plunging all of Westeros into the abyss of war."
His voice was filled with anger at having been manipulated.
Cersei's venom instantly found an outlet. "It must be Renly!" she shrieked. "That brother of Robert's wears a false smile every day while secretly plotting against the Lannisters. With Robert dead, he could take another step toward realizing his ambitions."
Her hatred of Renly and House Tyrell had sunk into her very bones after she learned of their plot to replace her as queen.
Jaime had also calmed down. "Renly is the likeliest suspect, but Stannis has a motive too," he reasoned. "Robert was distant from his brothers, yet as close as a brother to Eddard Stark. Perhaps both of them were eager for Robert to die and clear the way."
He recalled the inscrutable smile that always hung on Renly's face.
Tywin picked up the fresh cup a servant had brought him and sipped the dark red wine, his eyes as deep as an abyss. "It goes well beyond those two. Renly? Stannis? Only two clear targets, yet there were three letters."
Jaime's pupils contracted slightly. "Father, do you mean there is another power involved? An ambitious schemer hiding in the shadows?"
"It is too early to draw conclusions, but we must remain vigilant. Especially you, Cersei."
His stern gaze settled on his daughter again. "Jaime and I leave for the Riverlands front today.