It was Scott's voice all right; Mystique was a professional at what she did. Way back when she was fighting against the X-Men, Logan had been the only one to be able to literally sniff her out for who she really was. Everyone else had been easily fooled. She straightened and watched Scott walk around her, watched the way he looked around the mansion. It was impossible to glean anything from him reaction simply because she knew any shifter as good as Mystique would have done her homework enough to pull off a believable copy.
The Miss Pryde thing threw her off. She would always think of herself as just Kitty to all the X-Men older than she was, especially someone like Scott. He'd done a good portion of her training himself. With everything in her, Kitty wanted to believe this was Scott. As he turned back to face her, even came close enough to place a hand on her shoulder, she was torn between giving in to her hope and caution. "You were dead," she said quietly, studying his face. "Ro and Logan said you were dead. They brought back your sunglasses and..." She trailed off, her bottom lip going between her teeth. There had to be a way for him to prove it was really him. If she could know for certain, it would go a long way.
"There are no other telepaths here right now." She was making herself very vulnerable to attack if this really was an enemy before her. But this lie, if it turned out to be a lie, would be too deep of a wound for her to not be able to draw something from. If anything, anger at the deception would give her enough motivation.
"Before you left, who took over defense classes for you?" Logan had only pitched in twice to help Ororo out, but it had always been Scott's area. Twice was not huge by any standards, and not something she could imagine Mystique knowing or ever have a need to find out. Quietly, she prayed he would give her the right answer.