Kate Hudson and Matthew Bellamy left a store in Malibu yesterday, with him toting a kite under his arm. The new parents, who welcomed their son Bingham Hawn Bellamy about a week ago, hit the beach with her oldest son, Ryder, in the afternoon. Kate bounced back quickly after Bing's birth, going out for lunch with Ryder and Matthew just six days after his arrival. She also flashed a wide smile yesterday as she played in the sand with her son and fiancé. Kate and Matthew have yet to announce a wedding date, but Kate and the Muse rocker have been inseparable since they started dating last Summer.