Denise Richards has slammed speculation she is dating Eva Longoria's ex-husband, insisting the passionate clinch caught on camera was just "work". Richards, who has split with husband Charlie Sheen, co-stars with Tyler Christopher in upcoming US drama series SECRETS OF A SMALL TOWN and the pair were recently snapped enjoying a steamy kiss. Pals of the Wild Things beauty tell Star magazine she is crazy about Christopher's laid back personality and can't keep her hands off him. A source says, "Tyler has this sly smile and soft way of speaking that draws her to him. "Denise says he has a quiet, calm way about him that's probably reassuring after dealing with an extrovert like Charlie!" However, the actress' publicist dismisses reports of a romance as entirely fictitious. She tells The Scoop website, "That is so one hundred per cent wrong. They kissed on the set (as part of the show). Do you know how many freaking calls I got because of an on-set kiss?" Christopher divorced the DESPERATE HOUSEWIVES star Longoria in January 2005.