Is Megan Fox quitting Transformers?

After playing Shia LaBeouf's love interest in the first two Transformers flicks, it came as a shock when word got out that Megan would not return for Transformers 3. Rumors swirled that she was fired for everything from being difficult to work with to demanding too much money. But her reps say it was actually Megan's decision to leave the franchise that brought her fame. Whatever the reason, Megan seems totally happy and is busy working on other movies like Passion Play.