His expression told her all she needed to know, he wanted immortality. Not only that but he clearly saw her as the way to get it, which meant she had him exactly where she wanted him (or she would have had, if he hadn't been so damned flaky.) There was no doubt about it, she was going to have to be very careful how she dealt with James Moriarty, any slip-up would be fatal!
"I don't know that I'd say it could actually control death," she replied, considering his comment carefully. "It… resurrects- but only for short periods, bit like using jump leads on a car to kick start the battery briefly," Well, that wasn't strictly true, she'd found a way to tweak the glove so once it locked onto a host it didn't drop the connection, but there was no reason why he had to know that- not yet anyway.
"Like I said, I'm a bit out of the loop with what happened to me, I mean I know what I was planning, but I don't actually know what the outcome was," or indeed how much of the extra planning that she'd done had been exposed by any checking the team had done afterwards. "It might be useful if I could spend some time with any information that you have about me," she murmured, leaning a little closer and smiling. "I'd really appreciate it."