LOS ANGELES (Zap2it.com) - Don't mess with Jessica Simpson or you'll get a very strongly worded letter from her lawyers.

The singer-actress is so angry over an OK! magazine that speculates about the state of her relationships, her lawyers have sent a cease and desist letter, reports TMZ.com.

The document sent Thursday, Jan. 24 doesn't specify the exact "rumors" in the story, but it refers to the Feb. 4 publication which claims that Romo dumped Simpson in the wake of the Cowboys' loss to the Giants earlier this month and that Simpson is estranged from her sister, singer-actress Ashlee Simpson.

The letter claims that the article is "utterly false" and that "(1) Mr. Romo and Ms. Simpson have not broken off their romantic relationship; and (2) Ashlee Simpson has made no effort to 'distance herself' with her sister, Jessica, with whom she remains extremely close."

The starlet's lawyers claim that the article constitutes defamation because it tries to "damage her romantic and familial relationships" as well as "erode her public standing." Furthermore, the letter states that the story's "statements are not protected ... simply because they appear in a gossip column."

The letter demands the magazine "immediately publish a prominent and unambiguous retraction" and "cease and desist from publishing any further false and misleading attacks" against Simpson and her family.

Simpson and Romo have been dating since November 2007, and some fans have blamed her for the Cowboys' poor performances, even dubbing her "Yoko Romo" after Beatles' wife Yoko Ono.