Mouth stretcher for braces?

I think it looks worse than it really is. If you stretched your lips with your own fingers, and then held it there for a while and then let go, your lips are obviously going to be a bit dry and uncomfortable, but crack? Like your lips CRACKING apart? Haha, no, but they can crack a little bit, but I doubt it will bleed. The best thing to do is wear a little lip balm so your lips are not dry beforehand. It doesn't hurt either, it's not like a needle or whatever.