They say “Twilight” fans are the most passionate, loud and powerful crowd of fans that ever was. In many ways, they are right, since the fanbase in question is not only incredibly large but also very strong-willed – and one thing the fans will not stand for is Kristen Stewart cheating on her official boyfriend with Robert Pattison. The actress is being bombarded with hate mail, Kristen Stewart Daily reports.

Sources close to the actress reveal for the aforementioned e-zine that “Twilight” fans are extremely unhappy with her dating both Pattinson and Michael Angarano at the same time. While they are excited at the idea of Kristen and Robert taking their love affair off-screen as well, the thought that she’s double-crossing him is more than they can stand. Consequently, they have started sending her hate mail and letters to the Summit Entertainment, asking the movie studio to do something about the situation.

Most letters and emails come from Pattinson’s female fans, the same source says. “Kristen has had letters from girls who don’t think she’s treating Rob fairly because she’s dating Michael Angarano. The fans love Rob, and they love the idea of Kristen and Rob romancing off-screen. But they don’t like the idea that she might be hurting their favorite young actor by stringing him along while she is still dating Michael. The letters, which are being sent to the studio, accuse Kristen of being heartless by dating both guys.” KSD writes citing an unnamed but reportedly reliable source.

However, another spy insists that, despite the ongoing rumors, there is really nothing going on between Kristen and Robert – not that the possibility that there might be a romance in the future does not exist. Apparently, Stewart really likes the British star and the feeling is mutual, but they have not made a step in that direction just yet. Chances are that they will sometime in the future, since they still have two more movies to shoot together, the same insider reveals.

“Kristen cares very much for Michael, but she also has a crush on Rob. And while Michael wishes Kristen would get over Rob, he isn’t ready to pull the plug on their relationship. Michael knows that Kristen and Rob still have two more ‘Twilight’ movies to do together, so anything can happen between them. And while he hopes he ends up with her, he knows he might lose her to his rival. Meanwhile, Kristen hates that fans are upset with her. She wants them to know she genuinely cares for both Rob and Michael – and doesn’t want to hurt either. Kristen hopes fans will understand how she feels and stop sending her hate mail.” KSD explains, quoting the second insider.

Yesterday, rumor emerged that Kristen Stewart was pregnant with Robert Pattinson’s baby, as we also informed you.