(WENN) - Model and fashion designer Kimora Lee Simmons has fueled rumours she has split from her actor boyfriend Djimon Hounsou after failing to deny break-up reports in a series of tweets.

The couple found its relationship under scrutiny this week when an article in the New York Daily News suggested the stars had called it quits following a big argument over money.

"Djimon walked out on Kimora," a source told the newspaper, adding the split may have happened after Simmons' ex-husband recently stopped funding her expensive lifestyle.

"Kimora lives as if she's the queen of England," the insider said.

"[Hounsou] is a calm, super-nice person and she's such a diva," the source said. "I couldn't believe they got together in the first place."

The Daily News said representatives for Simmons and Hounsou neither confirmed nor denied their breakup when asked for a comment.

The report speculated that music mogul Russell Simmons' ex-wife was in financial difficulty after placing her six bedroom home in Beverly Hills, California on the market for $4.7 million - more than $1 million less than her purchase price in 2007.

Lee Simmons quickly took to Twitter to blast reports of money troubles, writing, "Wow, I put 1 of several properties I own (+DON'T live in) on the market & now apparently my whole life is fallin (sic) apart?! Rumors, rumors..."

However, the beauty stopped short of addressing the main topic of the article - her romance with Hounsou - and her representative simply says, "Kimora has a beautiful family life."

A publicist for Blood Diamond actor Hounsou has also dodged the split rumors, telling the New York Daily News, "Djimon's been working in Vancouver for the past few months."

Lee Simmons and Hounsou began dating in 2007 and are parents to three-year-old son Kenzo.

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