She has gotten deep, deep under his skin. He does hate her with a burning rage. She's bested him, humiliated him, and now has the gall to smirk in his face. His pride is very threatened by her, and he needs to assert his dominance, get his revenge.

Without another word, he moves swiftly behind her chair, grabs her wrist, and bends her right arm in the wrong direction until it breaks. It's easy; he's strong and she's built like a toothpick. A sickening snap cracks through the air, and he grins.