Kelly Clarkson has had enough! The rumor mill has been spinning, claiming that her husband Brandon Blackstock has been unfaithful, and the star is begging to end the gossip -- but not for the couple's sake.

Clarkson took her frustration to Twitter to clear her husband's good name and call off the lies. "Keep hearing random rumors of me & Brandon splitting or that's he's cheating on me. Stop with all the lying please #aintnobodygottimeforthat," she tweeted.

The reason for her blatant begging? "False rumors don't bother me & Brandon but they do affect the lives of our 12 & 7 yr old. They're kids &don't get that people can print lies," the singer added.

Not only is she a classy lady, but Clarkson is a devoted stepmom, too.

Apparently, rumor has it that an anonymous woman stepped up and 'spilled all' regarding an alleged relationship with Blackstock. "We haven’t slept together," she claims, "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."

Clarkson insists Blackstock -- who is Blake Shelton's manager and Reba McEntire's stepson --  is the great man he seems to be, and even his ex-wife agrees. Just a few months ago, a Blackstock family friend accused the music manager of cheating on his ex-wife, Melissa Ashworth, multiple times, but she herself slammed the claims.

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

Hopefully the rag mags will learn not to cross with mama-to-be Clarkson -- or her stepkids. A good mama bear will always protect her young!

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