Shae betrayed Tyrion primarily due to her escalating paranoia and a profound misunderstanding of his true intentions. Tyrion's actions, which he believed were for her safety, were tragically misinterpreted by Shae, leading her to side with his enemies.
The Core Misunderstanding
Tyrion loved Shae deeply and recognized the immense danger she faced by remaining with him in King's Landing, especially given his precarious position within the Lannister family and the political turmoil. To ensure her safety and compel her to leave, he made the agonizing decision to push her away in the most painful way possible. He verbally abused her, publicly humiliating her and cutting deep by calling her a "whore." He knew these words would deeply upset her and hoped they would force her to depart King's Landing, thus protecting her from the inevitable fallout of his own conflicts.
However, this plan, while well-intentioned on Tyrion's part, tragically backfired. Shae never fully grasped Tyrion's true motive of protection. Instead, his harsh words and apparent rejection solidified her existing paranoia and feelings of betrayal. She perceived his actions as a genuine dismissal and an abandonment, leading her to believe he had discarded her after all they had shared. This deeply wounded perception, coupled with her own fears, fueled her decision to retaliate by testifying against him and aligning herself with Tywin Lannister.
Contributing Factors to the Betrayal
Several elements contributed to Shae's ultimate betrayal:
- Tyrion's Harsh Treatment: His deliberate use of cruel words, particularly calling her a "whore," was intended to break her heart and force her departure, but it also cemented her belief that he no longer valued her.
- Shae's Paranoia: Her pre-existing insecurities and fears were exacerbated by Tyrion's actions, leading her to misinterpret his protective measures as outright rejection and treachery.
- Lack of Open Communication: While Tyrion's desire to protect her was paramount, his inability or unwillingness to clearly articulate his true intentions left Shae in the dark, allowing her fears and misinterpretations to fester.
- Vulnerability and Fear: As a former prostitute and Tyrion's secret lover, Shae was always in a precarious and vulnerable position within the cutthroat world of King's Landing. When Tyrion cast her aside, she likely felt exposed and without allies, making her susceptible to the overtures of those who sought to harm Tyrion.
Ultimately, Shae's betrayal was a tragic outcome of a desperate act of protection misunderstood by its intended recipient, culminating in heartbreak and profound consequences for all involved.