A number of reports also suggested that the rocker, whose struggles with alcohol and substance abuse problems have been well-documented, had also suffered a relapse.
On Sunday (8 May), Ozzy and Sharon’s spokesperson confirmed that the Black Sabbath frontman is not currently living in their marital home.
Meanwhile, a source said: “Sharon went ballistic with Ozzy and accused him of having the affair.
“She said she had suspected something had been going on for some time and now had proof.
“Ozzy was extremely sheepish and admitted being close to Michelle [Pugh, celebrity hairdresser].
“It is likely Sharon has discovered calls and possibly meetings.”
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'X Factor' Judges Through The Years
Series 1-3 (2004-2006)(01 of11)
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The original line-up: Sharon Osbourne, Simon Cowell and Louis Walsh (credit:ITV)
Series 4 (2007)(02 of11)
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All change: Dannii Minogue joins Simon Cowell and Sharon Osbourne, with Brian Freidman replacing Louis Walsh.Dermot O'Leary also replaces Kate Thornton as the show's host.
Series 4 (2007)(03 of11)
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The return of the Walsh: Louis makes a comeback after Brian Freidman is axed from the panel after only a few days of auditions.
Series 5-7 (2008-2010)(04 of11)
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The golden era: Cheryl Cole replaces Sharon Osbourne, joining Simon, Dannii and Louis.
Series 8 (2011)(05 of11)
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A mass exodus: Gary Barlow, Tulisa and Kelly Rowland join the only original remaining judge, Louis Walsh.
Series 9 (2012)(06 of11)
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Schermazing: Nicole Sherzinger replaces Kelly Rowland, joining Gary, Tulisa and Louis.
Series 10 (2013)(07 of11)
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She's BACK! Sharon Osbourne rejoins the panel after five years, replacing Tulisa and joining Louis, Gary and Nicole. (credit:Rex)
Series 11 (2014)(08 of11)
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REUNITED: Simon and Cheryl return alongside Louis Walsh and new judge Mel B. (credit:Syco/Thames/ITV)
Series 12 (2015)(09 of11)
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Bye bye Louis: Nick Grimshaw and Rita Ora replace Louis and Mel, as they join Simon and Cheryl on the panel. Meanwhile, Caroline Flack and Olly Murs step into Dermot's shoes as hosts. (credit:Twitter)
Series 13-14 (2016-17)(10 of11)
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A vintage line-up: Nicole, Louis and Sharon all stage sensational returns to the panel after the departures of Cheryl, Nick and Rita, while Dermot also returns as host. (credit:ITV)
Series 15 (2018)(11 of11)
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WTF?! Louis Tomlinson becomes the first former contestant to join the panel permanently, while Robbie joins the panel alongside his wife and 'Loose Women' panellist Ayda Field. (credit:Doug Peters/EMPICS Entertainment)