Kelly Clarkson is apparently "pregnant and betrayed" by her husband Brandon Blackstock, according to a new cover from Star magazine.

The tabloid quoted one of Blackstock's alleged mistresses, who says she "had sex" with the music manager after a night out in Los Angeles. The woman even claims she is five months pregnant.

"She finally thought her dream to get married and have a baby had come true, but it's turning out to be a nightmare," an alleged source told the magazine about Clarkson. "It will break her heart completely if these women are telling the truth."

However, the singer previously blasted other negative rumors about her relationship with Blackstock via Twitter.

Find Out What Brandon Blackstock's Ex-Wife Thinks About Kelly Clarkson 

"Keep hearing random rumors of me & Brandon splitting or that's he's cheating on me.Stop with all the lying please #aintnobodygottimeforthat," she wrote on Dec. 6. "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."

Ever since Clarkson tied the knot with Blackstock it seems the rumors have run rampant.

Kelly Clarkson Jokes About Hardships Of Pregnancy With Ellen DeGeneres

The singer and Blackstock got married on Oct. 20 at Blackberry Farms in Tennessee. Although she eloped with her husband, Clarkson shared her wedding day with fans through a short clip she uploaded on Twitter on Oct. 22.

"Here is a little video of our special day! Thanks to everyone for all of your well wishes!!! #cloud9 #tieitup," she captioned the clip.

She later announced her pregnancy via Twitter on Nov. 19 and wrote: "I'm pregnant!!! Brandon and I are so excited! Best early Christmas present ever."

Tags: Kelly Clarkson Brandon Blackstock