"Twilight" stars Kristen Stewart and Robert Pattinson have probably been talked about more than ever in these past few weeks, centering around their appearance at Comic-Con and new 7-minute footage, photos and posters for their upcoming movie, "Breaking Dawn Part 2."

Rumors about an all-tell book on the couple's romance have surfaced. Entertainment Wise reported that OK! Magazine mentioned a book, which promises to be a "juicy read" to focus on the scandalous way the couple got together and how Rob used cast mate Nikki Reed (Rosalie Cullen in "Twilight films") to get Stewart away from her then boyfriend Michael Angarano.

The source told OK!: "One big topic will be how they first got together. Rob basically stole Kristen from first love, Michael Angarano, and used castmate Nikki Reed along the way. When Rob saw he couldn't have Kristen he went for Nikki - but he never stopped pursuing the lady he really wanted."

"It was a bit sad because Kristen and Nikki started out as really good friends, but then because of Rob they ended up hating each other," a source explained.

But the juice doesn't end there. The insider promises the tale of their relationship will be just as shocking to fans.

The source added: "They are very liberated sexually - there were even suggestions that they were in an open relationship, so that could come up."

"And of course their love of partying could be a topic. The book could get to the bottom of all the rumors once and for all."

In an interview with E!'s etalk Canada, Pattinson spoke about having feelings for the young Stewart while watching her in early movies, reported by News.com.au.

"I knew before I met her [that we had chemistry]," Rob laughed to which Kristen responded, "Yeah, me too."

"I was watching 'Zathura' one day when she was frozen," Rob said referring to seeing Kristen as a fourteen-year-old actress in the adventure movie.

Stewart added that because her on-screen relationship with Pattinson is so intense it was easy to connect with him when the cameras stopped rolling.

"When you meet people that you want to embark on a creative endeavor with, it's like so intense and exciting it's palpable," she explained as she looked up at her beau. "You're like, 'It's him!'"

Also during the Canadian TV interview, the couple was full of banter when the taping was paused so the interviewer could be fitted with a new microphone, even though they were every-inch professionals on-camera, according to OK!.co.uk.

Stewart and Pattinson were play fighting, giggling, and joking with each other, with Pattinson jokingly saying that he wanted someone to push her off her chair now. He then playfully pretends to slap his girlfriend, who clearly finds his little prank very funny.

During the "Twilight" panel in Hall H at Comic-Con 2012 San Diego, Stewart hinted on their naughty side while shooting the vampire sex scenes in the upcoming movie.

Stewart said she was disappointed along with fans that the scenes had to be restricted, according to US Weekly.

"We're supposed to have mind-boggling, otherworldly...sex. In the first one, Breaking Dawn 1, we really...this is weird...tried to keep the first one sweet. It's about self-discovery. Nothing about this series is raunchy. And I know that..."

"In the second one, we just wanted to be animals," Stewart said. "We're not human anymore. How do you do that? We tried, and they told us it was rated R, and we were like [snaps fingers]. So, yeah, I'm going to stop."

Stewart and Pattinson share a special bond on and off screen. They are real life boyfriend and girlfriend. They have been together ever since they met in 2008 in the first film, "Twilight," in the series, written by Stephanie Meyer.

The "vampire" couple lately has been showing their devoted love for each other.

Eyewitnesses at Comic-Con said that they couldn't keep their hands off each other, according to Hollywood Life.

They looked "so in love." Eyewitnesses said that the two real-life lovers were "snuggly" during the 7-minute preview clip for "Breaking Dawn Part 2."

Talking about off-screen relationship, according to The Improper, The first "Twilight" film director, Catherine Hardwicke, has often talked about how she noticed the chemistry right off the bat when Rob and Kristen auditioned for the parts.

The off-screen chemistry can only help an on-screen great performance in "Breaking Dawn Part 2," set to release in theaters Nov. 16, 2012.