Who said "Sweet sister, what are you doing here"?

This quote is attributed to Jaime Lannister.

Sweet sister, what are you doing here - Jaime Lannister

"Sweet sister, what are you doing here"

Jaime Lannister Relationships

Character in A Game of Thrones

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"I will be your sword."

"There are no men like me. Only me."

"There is no shame in fear, only in how you choose to face it."

"You're my lightning"

"The key to a happy marriage is communication."

"Marriage is about compromise and understanding."

"Life's greatest treasures are relationships."

"Trust is a luxury I can't afford."