The conversation between human and AI assistant.
Did Tywin sleep with Shae out of pure spite?
That makes sense. But why did Shae betray Tyrion in the first place?
In the show, it's not entirely clear why Shae betrayed Tyrion. However, in the books it's suggested that she was actually a spy for Tywin all along and was working to undermine Tyrion's position. Alternatively, she may have turned on Tyrion out of fear for her own safety or out of a desire for revenge after he tried to send her away.