Kate Moss is the Sphinx by Marc Quinn at the Mary Boone Gallery

Kate Moss is the Sphinx by Marc Quinn at the Mary Boone Gallery in NYC. When Kate gets pregnant with Pete Doherty's baby the artist can make a whole new series.

Meanwhile Kate Moss wants a baby with fiancé Pete Doherty, it has been reported.

The supermodel, who launched her Topshop fashion line this week, is said to be desperate to start a family with the Babyshambles frontman.

According to Britain's Daily Express newspaper, Kate told a friend:"Everyone is obsessing about a marriage and where we are with that. None of that counts because we are together. What counts is having a family and we need the bond of a child. Pete would make a fun dad."

Kate, 33 - who has a four-year-old daughter Lila Grace from a previous relationship - is allegedly convinced having a child with Pete, 28, will cement their love.

She apparently said: "We've got our music together and we're writing an album but a baby would be the clincher between Pete and me. Lila deserves a sister."

Pete, who has entered rehab for drug addiction several times, already has a three-year-old son Astile by his ex-lover Lisa Moorish.

It is reported he has limited access to his son because of his drug use. Last year, Moorish - who also has a daughter, Molly, with Oasis singer Liam Gallagher - is said to have told Pete to clean up his act or risk not seeing Astile over Christmas.

Kate insists Pete is "wonderful" with Astile and believes having a child with him will help the rocker kick his drugs habit for good.