No spoilers! but the real reason you can't romance her was because of time/budget of the game. Even Vaelis was made as a sort of father figure to avoid chances of someone wanting to romance him. Remember the meme "Romance all sprites"! as much as I want to offer romance options, I don't want to delay the games too much (see what's happening with the HUGE romance RPG that's Loren 2) only because of that
Also, after I had seen how huge the romance dialogue file for LtAP had been, and considering how big the script for SotW was even WITHOUT the romantic dialogue, I really didn't have much motivation to write full romantic sub-plots for Vaelis and Rowinda any more. I did give them smaller sub-plots (and personal quests, eventually), but really, what made me want to write the script (aside from the money ^_^) was the chance to tell the story of a great epic adventure, not six sappy romances. (And as you will find out, even the romances I DID write are hardly conventional...)
it's good to be THE HEROES!
Doing chapter 17 now, first batch of long quests series. The act 3 ends at chapter 21, but those 4 chapters will probably keep me busy for a month. And still don't have the tileset needed for this act