Okay, this is just what I needed today. It's not too fluffy, but it's great fun, and an awesome premise. I love the happy ending, too.
And playing with time-turners for the WIN!!! Seriously, there's so much potential in that little device, and I don't think people abuse use it nearly enough.
The sex was incredibly hot, and I love how their relationship twists and turns at each... twist and turn. :P