re: Crackpot ASOIAF Theories SPOILERS

So, I forgot about this part in AFFC, but this quote stuck out to me.

quote:

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That night he dreamt that he was back in the Great Sept of Baelor, still standing vigil over his father's corpse. The sept was still and dark, until a women emerged from the shadows and walked slowing to the beir. "Sister?" he said.

But it was not Cersei. She was all in grey, a silent sister. A hood and veil concealed her features, but he could see the candles burning in the green pools of her eyes. "Sister," he said, "what would you have of me?" His last word echoed up and down the sept, memememememememememememe.

"I am not your sister, Jaime." She raised a pale soft hand and pushed her hood back. "Have you forgotten me?"

Can I forget someone I never knew? The words caught in his throat. He did know her, but it had been so long...

"Will you forget your own lord father too? I wonder if you ever knew him, truly." Her eyes were green, her hair spun gold. He could not tell how old she was. Fifteen, he thought, or fifty. She climbed the steps to stand above the beir. "He could never abide being laughed at. That was the thing he hated most."

"Who are you?" He had to hear her say it.

"The question is, who are you?"

"This is a dream."

"Is it?" She smiled sadly. "Count your hands, child."

One. One hand, clasped tight around the sword hilt. Only one. "In my dreams I always have two hands." He raised his right armand stared uncomprehending at the ugliness of his stump.

"We all dream of the things we cannot have. Tywin dreamed that his son would be a great knight, that his daughter would be a queen. He dreamed they would be so strong and brave and beautiful that no one would ever laugh at them."

"I am a knight," he told her, "and Cersei is a queen."

A tear rolled down her cheek. The woman raised her hood again and turned her back on him. Jaime called after her, but already she was moving away, her skirt whispering lullabies as it brushed across the floor. Don't leave me, he wanted to call, but of course she'd left him long ago.

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Evidence of Tywin not being Jaime's or Cersei's father?