Hi Johnny
It's very well produced. Sounds great quality. The lyrics are typically....what's the word...soppy? (I'm sure there's a better word)....but that's the point, weddings are soppy!! So I think for that you've hit the nail on the head here. Very nice that you've written this for your niece too, it will always hold meaning for her.
In terms of developing/rework this I think it would be interesting if you made it a little grittier, if that makes sense. 9 years have past and it's amazing how things can change in this time, including perspectives. I think a rework that reflects on the past 9 years since the special day could be really interesting. I think you have a great starting point here, good luck with it. Be good to hear where you go with it
Kind regards
Darren