Hmmm - what if it was Cutter?
Well, he had that arrowhead jammed under his rib, he had waited for this true love until he couldn't wait no more and Kahvi was drunk. Not the ideal set of circumstances that have to come together to make a cub. I don't think Kahvi would have had any luck wooing him - he would have gone back to the troll caves to get wrapped up again and I'm sure the story wouldn't have changed too much. (Cutter and Nightfall are too much alike to change the EQ timeline if their places got swapped. They're both prone to make the same judgement calls.)
But that's my take on it. I'm sure it can be easily re-written to have turned the timeline upsidedown.