Not once in his life had JJ been one to mince words. The only reason he ever kept his mouth shut now was to keep clients (he'd learned the hard way). His power had never been something he'd kept a secret. Not while he was kid on Frye Island, and not now either. If this particular client didn't know about it for some reason, he wasn't worried about her finding out now. What was she going to do? Walk out, mid-tattoo? That would be pretty dumb.
He glanced over at Elliot with a small smirk, "Set something on fire?" He asked. He'd always been notorious for it. It was a symptom of their particular mutation. Not much to be done about it really.