Pregnant To A Cheater? Ex-Wife Of Kelly Clarkson's Husband Blasts Infidelity Reports As 'Silliness'

First comes love, then comes marriage, then comes the baby -- and then come cheating rumors? Just days after announcing her pregnancy, Kelly Clarkson's baby joy has been shattered by a new report from an anonymous source accusing her husband, Brandon Blackstock, of cheating on her. But now, his ex-wife, Melissa Ashworth, is speaking out to RadarOnline.com to blast the "ridiculous" rumors.

The report, posted on TheDirty.com on Monday, is allegedly from a woman who has been getting close to Blackstock for the past five months. "We haven't slept together," she claimed, "but we've been intimate in other ways. I really hope his wife keeps her eye on him because he's not the great man she thinks he is."

A few months ago, the couple was faced with similar claims when Blackstock's family friend, Jerry Reed, accused him of "running around on" Ashworth "three or four times" during their marriage. The two finalized their divorce in early 2012, months after Blackstock began dating Clarkson.

But Ashworth insists that her ex-husband has never been anything but a model partner and father, and will be the same to Clarkson and their child.

"This is ridiculous ... this silliness," Ashworth tells RadarOnline.com exclusively. "I have my two children by Brandon right here, who I love."

She continues, "I adore Kelly and Brandon as a couple, so if I say anything it's going to be positive."

Blackstock and Clarkson have yet to comment on the rumors.

Clarkson, meanwhile, postponed the overseas promotional tour for her new Christmas album, "Wrapped In Red," claiming to be "incredibly ill" from her pregnancy.