Rumors of an affair between Kelly Clarkson's new husband Brandon Blackstock and an anonymous woman have been circulating thanks to a new post on The Dirty, a gossip and slander site that the woman who Blackstock is allegedly seeing wrote into on Dec. 2.

"Nik, I wanted to submit this story to you because I didn't know where else to turn," the anonymous source wrote to site runner Nik Richie. "I like the idea of keeping myself anonymous, whereas any other media outlet would have jumped at publishing my name. I have a career and children to keep safe, so your site was my best option. Short and simple: Brandon has been cheating on Kelly (with me) for the past 5 months. We met at a golf club in TN and have exchanged multiple texts and hung out a few times over the last little while. Because his parents are music royalty, Brandon really thinks he is invincible and better than everyone else. I don't even know why I'm saying any of this since my story isn't that juicy. We haven't slept together 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 that she thinks he is."

Blackstock and Clarkson have been together since 2012, and were married on Oct. 20 in a beautiful Tennessee country wedding, an event so small that Blackstock's legendary step-mother, Reba McEntire, didn't make an appearance.

Clarkson, who became a step-mother herself to Blackstock's kids from a previous relationship, 11-year-old Savannah and seven-year-old Seth, also announced last month that she and Blackstock are expecting their first child together.

While The Dirty insider cannot be verified, Blackstock's ex-wife, Melissa Ashworth, defended her former beau to Radar Online and denied the rumors.

"This is ridiculous...this silliness. I have my two children [by Brandon] right here, who I love," Ashworth told Radar. "I adore Kelly and Brandon as a couple, so if I say anything it's going to be positive."

Clarkson and Blackstock's reps have yet to comment.