For a moment, she was tempted to call up a fireball just to prove that it was - but instead she refrained, admonishing herself. She wanted to help her sister, not terrify her! Keeping Zoe's hands in hers, she gave a faint smile when the tattoo was noticed, then came up with the easiest answer possible. "I had it injected with a special ink. It essentially broke the Alchemist tattoo so that I'm not being controlled by it anymore."
At her sister's protests, she waited until Zoe finished, and squeezed her hands softly. "Think about it, Zoe - the tattoo itself is filled with Compulsion. We know that. Think about the words they have us say." And then she pushed, just a little, "And think about the very words: re-education. To re-educate someone, it's to change how they think and feel, what they believe. When was the last time you had the chance to think for yourself?"