Katherine Heigl and Josh Duhamel at the premiere of Life as We Know It at Ziegfeld Theatre in New York (9/30)

Are Katherine Heigl and Josh Duhamel sleeping with each other? Probably not, but it'd be just plain irresponsible of me not to publicize the rumors and destroy their reputations. From the National Enquirer:

“Knocked Up” star Katherine Heigl’s intense off-screen relationship with “Transformers” hunk Josh Duhamel has plunged both their marriages into crisis, sources tell The Enquirer. The two played lovers in the romantic comedy “Life As We Know It"...

Despite their spouses’ concerns, 32-year-old Katherine and Duhamel, 38, refuse to tone down their relationship, said the source. “Josh and Katherine make late night to one another and e-mail throughout the day,” the insider adds. “They excuse it as work a lot of the time, but now that promotion for the movie is pretty much done, there’s really no reason for them to be in touch so often.”

Sources say that Katherine’s husband Josh, 30, is complaining to pals, and Fergie, 35, is suspicious of her cheating husband, who-as The Enquirer exclusively revealed- engaged in a marathon sex session with stripper Nicole Forrester while filming “Life As We Know It” in Atlanta in October 2009. “It’s a mess for both couples,” said the insider.

What's wrong with Hollywood publicists these days? These sort of contrived controversies designed to stir up media attention are supposed to come out closer to a film's release date -- not two months after. Besides, a romantic comedy starring Katherine Heigl doesn't need extra press -- it needs TO BE DESTROYED WITH FIRE.

*25 Katherine Heigl and Josh Duhamel pictures total in the gallery:

[WENN, Mavrixonline]