Actor David Duchovny has played down rumours he cheated on his wife after he admitted to an internet porn habit, according to reports.The 48-year-old was rumoured to have strayed from his actress wife Tea Leoni in reports that emerged after he entered rehab for sex addiction last week.But according to Fox News, Duchovny's dependency stemmed from an obsession with online porn - of which Leoni is allegedly aware of and has been supportive, says a source.Just last week, the actress cancelled an appearance at the Toronto Film Festival, missing the debut of her forthcoming film Ghost Town to be by the actor's side.

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