If Hugh didn't "chuck a Kahn" then what happened?

... was his flirtation with a glamorous film executive what finally destroyed their relationship?

Her gaze was coquettish, the lingering embrace too affectionate for comfort. When Hugh Grant cuddled up co-star Drew Barrymore and fixed her with his famous blue eyes, Jemima Khan could do nothing but watch stiffly from the sidelines, a look of exasperation etched on her face.

Was that the final nail in the coffin for one of the most talked-about relationships in the country? The final embarrassment that this weekend prompted the 33-year-old heiress to tell the world her three-year partnership with Grant is over?

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