With anyone else, her instinct would have been to say yes, everything would be alright, without a doubt. They would prevail like they had last time. But this was Patience. She'd lied to her in the past... well, in a way... but she didn't want to do that anymore. So after a moment, she said, "I don't know. I want to say yes, but I don't know." Pausing, she picked at the sleeve of her shirt above her Mark, and then added, "If something big was ever going to happen and I knew, I'd tell you. I'd get you out of the way." Because almost everything that Chas had done to get herself here, as a Death Eater, had been to protect Patience and herself. In the end, she was more loyal to her sister than she was to anyone else, including the Dark Lord.