uses shiel

"The shield," I said quietly. "When did you use it?"
She swallowed. "The skinw-the creature threw Thomas into the cabin and he..." She shuddered. "Harry. He'd changed. It wasn't... it wasn't him." She licked her lips. "He sat up and started sniffing the air like... like a hungry wolf or something. Looking around for me. And his body was..." She blushed. "He was hard. And he did something and all of a sudden I wanted to just rip my clothes off. And I knew he wasn't in control. And I knew he would kill me. But... I wanted to anyway. It was so intense..."
"So you popped the shield."
She swallowed and nodded. "I think if I'd waited much longer... I wouldn't have been able to think of it." She looked up at me and back down. "He was changed, Harry. It wasn't him anymore."


Turn Coat Chapter 46, Page 472-273