Hellmuth Dominguez, PacificCoastNews.com / Pacific Coast News 1 / 3
Hellmuth Dominguez, PacificCoastNews.com / Pacific Coast News 1 / 3

Jessica Simpson exuberantly announced "the man who loves [her]" was at a Feb. 6 concert -- seemingly oblivious that Tony Romo was in the audience with Natalie Smith, a younger, skinnier look-alike of the singer, that, according to the new issue of Us Weekly, he had been sending "flirty texts" to for months while still dating Simpson.

Backstage after the Champaign, Ill. show, Romo introduced Simpson to the 22-year-old, who is the daughter of the associate athletic director at Romo's alma mater, Eastern Illinois University.

"We hung out for, like 10 to 15 minutes, backstage," Smith tells Us Weekly (on stands today). "She was cool and nice."

But multiple sources tell Us that Simpson should have been more suspicious, as Romo was having an emotional affair with Smith months before dumping her on July 9, the eve of her 29th birthday.

"They are not officially dating, but they are having an intimate relationship," a Smith source tells Us. Adds another pal of Smith, who typically dined with Romo when he'd visit his college town: "They've always flirted and texted each other. They had phone conversations one to two months before the breakup."

For more details on how Simpson's a "wreck" over the news, how Smith is determined not to become clingy like Simpson, details of Romo's multiple secret meetings with Smith while he was dating Simpson (including one just days after he dumped her) and how Simpson will get her revenge, pick up the newest issue of Us Weekly, on stands now.

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Look back at Jessica Simpson's most outrageous moments.

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See all of Jessica Simpson's Us Weekly covers.