It's interesting to read about Rose's point of view of what happened. I think you're right and she probably would've put some kind of time span on Jack's life. And it's probably just as well that she doesn't remember what happened too. I always wondered what would've happened if the Doctor would've done if he'd held onto the power of Bad Wolf longer. Great story.
Author's Response: Thank you! I just don't think Rose would have intentionally made Jack immortal, so it makes sense that she didn't get to finish what she'd started, and now poor Jack is paying the price because the Doctor jumped the gun.