He froze at the sound of the voice- he recognized it, and the woman speaking, because she'd come to see him when he'd been a monster and even after, when he'd been pretending. This was Magneto's right hand woman, he knew that much, and he knew she was called Mystique and that she was a shapeshifter but he hadn't understood why she'd come to see him or what she wanted. Even now her tone of voice and her term of endearment- darling?- confused him and he shook his head at her.
"But it is not my home," he said quietly, finally turning to face her, his expression guarded and his tail flickering nervously behind him. He stood rigid, his body tensed, ready to teleport at the first real sign of danger from her.