Wow Fel, you're certainly pumping out these chapters. I don't start reading till a month after you start writing the story and bam your already up to Chapter 13

! Not that I'm complaining but wow you must really be enjoying writing this one. I know I'm enjoying reading it.
There are a few things I would comment on however. One is the speed of the relationship, it does seem a little on the unbelievably fast side. I know you keep commenting on it within the story but I keep thinking like the parents: its unbelievably fast, especially for two people with so little dating experience, but heck it is your story. I am enjoying the characters, as a reader you do really get into them and I love the the different family dynamics. You have a real talent for keeping the reader engrossed. The last thing I would comment on is merely for when you get to editing: put in the Bengals(?) colours. You mention the Den is decked out in the colours but not what they are. Don't assume everyone knows what they are. I for one live in Australia, don't follow Rugby or AFL, let alone American football, so have no hope in hell of knowing.
All in all I'm enjoying the book!