But the actress looked relaxed and happy as she sat down for her first television interview with on-off-on again boyfriend and co-star Robert Pattinson.
The stars sat down with co-star Taylor Lautner for televised chats on MTV News and Entertainment Tonight on Thursday, to promote the forthcoming last instalment in the franchise, Breaking Dawn: Part II.
Happy and relaxed: Robert Pattinson and Kristen Stewart laughed and joked their way through what could have been an awkward first televised interview on MTV News on Thursday since the affair scandal
Stewart sat in the middle of the three stars, looking pretty in a blue and black top and black jeans while Pattinson sported a dark green blazer and shirt.
The real-life couple, who play Bella Swan and Edward Cullen in the hit franchise, are reported to have briefly split up after Stewart was photographed kissing her Snow White and the Huntsman director Rupert Sanders back in July.
The look of love: The subject of their real life relationship was strictly off-limits during the interview
Safety in numbers: Taylor Lautner joined Pattinson and Stewart for the chat to promote forthcoming film Breaking Dawn, Part II
'For the last few press junkets, they've been separating everyone which is silly. I think because we love hanging out,' she said.
The couple, who rarely discuss their relationship in public, seemed more than happy to talk about the Halloween party they attended together on Wednesday night.
'Oh yes, it looks awesome,' she said eyeing the photograph of herself in a pink bobbed wig and sunglasses. 'That's not fair. That's actually a really weird [photo].'
Mortified: Pattinson and Stewart admitted that their Halloween costumes weren't too impressive
Who are you? Stewart said she was dressing as a homage to one of her favourite films Closer in the pink wig, while Pattinson sported a '$3 mask from 7/11
'That's not me,' he exclaimed, laughing, admitting: 'I chose someone who is just genuinely terrifying. It was a $3 mask from a 7-Eleven.'
Stewart's choice was apparently an homage to one of her favourite movies Closer, where Natalie Portman wears a pink wig in some scenes.
'If you've seen that, that's one aspect of [Portman's] character. She changes a lot in that movie, but that's one part, yeah.'
First time chat: The stars assembled for a TV interview for the first time since the scandal broke, almost destroying Pattinson and Stewart's real-life relationship
Vampire Bella: New footage was shown of Breaking Dawn: Part II where Bella is a vampire
New dawn: Taylor Lautner as alter ego Jacob Black in the new Twilight movie which is released in November
'I'd imagine it's quite like the scene where she's doing the pottery in Ghost,' he quipped, when quizzed about a sex scene in the film.
The cast also recalled the audition process for the first Twilight film, with Stewart having had a say in who director Catherine Hardwicke cast as Edward and Taylor's character Jacob Black.
'I take full credit for both of these guys actually,' she said sarcastically when asked if she was partially responsible for their success.
More Twilight on the cards? Pattinson, Stewart and Lautner read from a joke script for Breaking Dawn: Part III
Best of friends: The cast admitted they would miss 'hanging out' with each other once the franchise ends
'I said to Catherine "if this is what we're being judged on, I haven't got the job.'
Later on in the chat, the notoriously press-shy Stewart was mortified when footage was played of her conducting an interview at the MTV Awards back in 2008 - and even got up from her chair and started pacing in embarrassment
'Why? Why?' she said, adding sarcastically. 'That's a photo album, favourite thing for me.'
'People had no idea who were were,' added Pattinson. 'I did three interviews that day saying I was in Narnia.'
What's next: Twilight author Stephenie Meyer joined the cast for the interview
'Unanimous unhappiness, he remembered. 'I think it's come full circle and they hate me again.'
Clearly, the rest is history, with the trio reminded that the franchise had bagged 16 MTV Awards - more than any other - including best kiss between Bella and Edward.
The trio were also joined by Twilight author Meyer who discussed her thoughts on the actors.
Fits of giggles: The cast joked with each other about what would happen in a third instalment of Twilight
Moving on: The British actor discussed his memories of life during the last four years of the franchise
Earlier, the author had told Entertainment Tonight in another sit-down chat that there was the possibility of another instalment in Twilight 'someday.'
Pattinson also discussed the contrast between the first film and the latest one, which is released in the U.S. on November 16.
'It felt quite free and dangerous,' he mused. 'This one - the bigger something gets - it gets pretty heavy. You're part of a machine at that point.
'You know your face is still going to be on the front of it. But you have a little bit less control - a lot less control. So it was kind of scary.'
Never-racking: Pattinson and Stewart look a little more uncomfortable after taking part in another sit down interview since Stewart's affair