If you hadn't have pointed it out, I'd have never noticed...

He betrays you regardless of character sex. His betrayal is part of the Warrior storyline (he was put up to it by Darth Baras), not the Quinn romance storyline.

That makes sense. Thinking back to when I chose the Flirt option with Lady Grathan, I think Vette approved at first (presumably thinking that I was just flirting with her to try and manipulate her) and then after she stepped in and asked if I was being serious it changed to disapproval. This explains a lot. I guess also the fact that we're not officially in a relationship (not that far along the storyline yet) she can't be too mad about other women. Thanks for the explanations guys :-)

As I've started trying to romance Vette I noticed a couple of strange things in the affection system that confused me and I'm not sure if they're intentional or accidental. Firstly, my character is male, and I've noticed that whenever I choose a [Flirt] option with a female NPC the "Vette approves." message appears and after the conversation/quest is over I gain influence with Vette as opposed to losing it. This came to a head in the mission where Vette goes to meet her old gang. When the option to [Flirt] with her friend (the red skinned Twi'lek) and "take her somewhere private", the "Vette approves." message popped up, but Vette's facial expression and dialogue in the cutscene seemed to she really didn't approve. I assumed this meant that the system wasn't too detailed and me flirting with her friend wouldn't affect the story going forward, however in the next companion quest I got with her she mentioned (and I'm paraphrasing here) that me taking her friend away for alone time upset her. This confused me as it seems the approval/disapproval messages and influence numbers are saying something different to the actual cutscenes and storyline. Additionally, am I correct in saying there used to be text that popped up saying "Vette will remember that." as opposed to "Vette approves/disapproves"? Was this system (which is admittedly vague) replaced in favour of an approval/disapproval system? I'm assuming the reason she seemingly approves of flirting is that my responses are split into categories, and she "approves" of whenever I'm polite/merciful/social etc. If that's the case, I'd say this was an oversight that should be addressed. Does anyone else have similar experiences?