Robert Pattinson and Kristen Stewart may be married ?

In the supermarket tabloid world, Robert Pattinson and Kristen Stewart may be married... but that doesn't mean all is well in nuptial paradise.

The relationship is hanging by an imaginary thread, in fact, as the latest issue of OK! Weekly claims Rob is pleading with Kristen to remain by his side and ignore rumors that he cheated on her with actress Sarah Roemer.

“Rob’s in total panic mode at the thought of losing Kristen,” an insider alleges. “He’s desperate to keep her and is virtually groveling on bent knee."

This same source says Stewart has always feared she'd lose Pattinson to an admirer and has "never been able to relax the whole time she’s been with him," constantly fearing the worst: infidelity.

The actor's supposed plan to prove his feelings? Purchase an inscribed, personally-designed diamond ring for his girlfriend and propose. But... wait. Aren't they already married?!? (See first link, above). These tabloids really need to keep their stories straight.