That sounded like a threat, if Crystal's methods were at all like the way she had 'protected' herself by Nick's account. Strange way to happen to stumble upon the best people to get her in contact with the Incredibly Capable Scarlet Witch. Just as strange as offering information like 'I'm an alien' freely and enthusiastically then quickly turning sour when it came to something a little more down to earth.
But Tony's smile was back, if it had looked more like a baring of his teeth at the start, and he straightened in his chair, crossing his arms like he gave serious attention to weighing Crystal's request. "I assure you, Wanda is not the only one who can perform miracles. I can also assure you that you will not be getting near her without our help," he delivered evenly, presenting Miss Crystal with her options. Tony really didn't mind walking out and leaving her to figure out her issues on her own, because he obviously wasn't going to get anything worthwhile out of this situation. The next time she terrorized the nightlife, the police could deal with her. If she came near Wanda, the Avengers would deal with her.