Ozzy Osbourne and Sharon Osbourne's marriage is on the rocks, The Sun reported on Sunday.
The couple have been living apart after moving out of their marital home and both have been spotted without their wedding rings on in the past week.
"He is getting on my new t*ts," Sharon, who underwent a double mastectomy in 2012, reportedly said on Saturday night.
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Their son Jack Osbourne, 27, took to Twitter to quash the rumours about his parents' marriage being in trouble.
"It's all bulls**t," the 27-year-old wrote. "Last time I check[ed] a lot of British newspapers weren't amazing sources of accurate information. Moving on..."
Ozzy's wife of 31 years is living in a luxury hotel situated two miles from the rented mansion that her husband is living in, it is being reported.
Friends of the celebrity couple have said the arrangement is "highly unusual".
"They are living at different addresses and not spending any time together," a source said. "They row a lot.
"They aren't acting like husband and wife. It is unusual to not even have dinner together when both of them are five minutes apart."
During a recent live Twitter session with fans, Sharon revealed she was going through a difficult time.
"I've had a really tough year and I ask myself the same question, how can I get up every day and smile," the former America's Got Talent judge wrote.
On Sunday, she retweeted a tweet from Black Sabbath in support of her 64-year-old rocker Ozzy, whose tour with his heavy metal band kicks off next weekend.
Last weekend Sharon was photographed without her wedding ring on as she went for lunch with her daughter Kelly Osbourne at the Ivy restaurant in LA.
When Ozzy filmed a cameo for US TV show CSI two days later he wasn't wearing his wedding band.
The pair are due to spend more time apart as Ozzy reunites with his band mates to tour Australia and New Zealand.
Sharon, who is tipped to be returning to the X Factor as a judge, will be back in the UK if she rejoins the celebrity panel.
She currently hosts daytime TV programme The Talk four days a week. Ozzy has been busy with pre-tour rehearsals.
They sold their £8.5 million home to Jessica Simpson in January. Moving lorries were seen taking items from the Hidden Hills pad, 25 miles north-west of LA, to Sharon's new five-bedroom home.
MTV's The Osbournes reality TV show shot the family of four into the spotlight in 2002.
Despite the frequent rows, they were portrayed to be a close-knit family.