They refuse to see the horrid inconsistencies of the situation often citing a throwaway banter line about preferring short-term engagements back in act 1 as proof or her flirty dialogue with characters BEFORE you are even committed to each other. Mind you a lot of characters have flirty dialogue with each other not just her.
Haha, I love the idea that people use that one line as an argument AGAINST her being mono. That line is one of the best in the game. If John wrote it I have to give him massive credit for such beautiful foreshadowing. It's literally at the start of the first act and it foreshadows the very epilogue of the game. The line goes as follows, after Gale (I think) asks if the others have someone in Baldur's Gate: Shadowheart: You mean just waiting, like a lovesick puppy? Short-term amusements are much less hassle.
Of course, we know exactly why she's not hyped about relationships. Shar doesn't want them to have one, and she's been recently mind wiped into being a perfectly good Shar slave before you meet her and cause her to fall in love with you and abandon Shar for you.
Now look at the epilogue. She has devoted herself fully to you. To the point that if you decide not to be with her, after she specifically asks you to do so, she'll say that she will be - you guessed it - waiting for you. Like a lovesick puppy.
Of course you're not meant to choose that, you're supposed to be with her unless you've been the one leading her on all along. However, it shows she has become that which she supposedly disliked, because she found her true self throughout the game - with you. It's amazing character development, and incredible foreshadowing for something that can be overlooked so easily. And apparently, has been overlooked by many. The writers don't get enough credit sometimes.
