Megan Fox is accused of using Twilight actor Robert Pattinson to light a fire under fiance Brian Austin Green.

The British heartthrob briefly romanced the Transformers star during a break in her relationship with B.A.G earlier this month. Rob was shocked to learn that the beautiful girl he’d made such a connection with had returned to her ex.

The National Enquirer’s Mike Walker writes: “Robert was really smitten with Megan. They met up a few times at Palihouse Lounge in Hollywood and he was on Cloud Nine,” but Megan was just using Pattison to make former fiance Brian Austin Green jealous….