World’s richest man Elon Musk allegedly had an affair last year with the wife of Google co-founder Sergey Brin, a Tesla investor and also a long-time friend of the billionaire, leading to their fallout.

According to the Wall Street Journal, Elon Musk had a romantic affair with Nicole Shanahan in Miami last year in December. Sergey Brin, who had helped support Elon Musk during his financial crisis in 2008, filed for a divorce from Shanahan in January and also cut ties with Musk. The Google co-founder also instructed his advisers to sell his personal investments in Elon Musk's companies in the last few months, as per the report.

It was also noted that Elon Musk had profusely apologized for the affair and also begged for Brin’s forgiveness. While the latter acknowledged the apology, their relationship, apparently, hasn’t been the same since. While Brin had provided Musk with about $500,000 for Tesla while he was struggling to boost production, Elon Musk had gifted Brin with one of Tesla’s first all-electric sport-utility vehicles in 2015.