She had weakened considerably with the battle earlier, the cruciatus exaggerated pain in all her nerves. However, that didn't hurt her as much as her Lord's last threat. Taking her dismissal she bowed low to him "My Lord" in a low croaked voice, and limped off to find her sister to get herself healed. She would need every ounce of strength, if she were to get through this war. Errant thoughts of fleeing the country would plague her thoughts in moments like these, yet she cast them away. You can't be a traitor amongst the Dark Lord's inner circle and expect a long life, besides the other side will just as easily kill her with the number of misdeeds she has done, willingly!