He had too much pride to come right out and admit his feelings, but she'd always known how Antonin felt. That had been part of the cruel fun of taunting him. Because he was vocally against her relationship with the former Unspeakable, Hermione enjoyed rubbing it in his face. And when Augustus was a complete idiot and ended their relationship for a ridiculous reason that didn't even make sense, she knew the other wizard was pleased, hoping that that would give him his chance to swoop in to claim her for his own. She resented his joy even if he was careful about concealing it. So in retaliation, she continued to upset him by inviting other men into her bed in the room next to his. Forced to listen to depraved acts that she knew he would like to perform with her, he'd grown even more difficult to live with.