Elon Musk posts a selfie with Sergey Brin and dismisses rumors that he had an affair with the Google co-wife founder's as "complete bs."

The then-wife of Google co-founder Sergey Brin, Nicole Shanahan, and Elon Musk had a brief relationship in the fall of last year, according to a shocking Wall Street Journal report published on Sunday. Musk refuted the Journal's claims that the romance caused Brin and Shanahan to get divorced and brought an end to their strong friendship. He referred to it as a "hit piece" on Sunday and tweeted a photo of himself with Brin on Monday.

In a tweet, Musk criticized the Journal's claim, calling it "complete bs." "I'm friends with Sergey, and last night we went to a party together," Sunday, Musk tweeted. "In three years, Nicole and I have only met twice, and both times, there were many of other people present. Nothing sentimental."

"I'm friends with Sergey, and last night we went to a party together," Sunday, Musk tweeted. "In three years, Nicole and I have only met twice, and both times, there were many of other people present. Nothing sentimental."

Musk shared a selfie on Monday with Brin in the backdrop.

We are confidence in our sourcing, and we stand by our reporting, The Wall Street Journal said in a statement to CNET.

Musk and one of his senior colleagues were found to have discreetly given birth to twins in November at around the same time. In addition, Musk has fought claims that his company, SpaceX, paid a flight attendant $250,000 to settle claims that the billionaire had exposed himself to her while they were in the air.