"definitely" wants children with husband Stephen Belafonte.The former Spice Girls star - who has a nine-year-old daughter Phoenix with ex-husband Jimmy Gulzar and a 15-month-old daughter Angel with actor Eddie Murphy - is keen to expand her family even further with movie producer Stephen.She said: "Yeah, we definitely want children. Not just yet - I think in a few years, definitely."Mel also revealed she thinks the secret to a happy marriage is being good friends with your spouse.She added to Britain's Star magazine: "I think marriage agrees with me - I'm happy all the time! We're the best of friends, which I think is one of the most important things in a successful marriage."However, Mel said Stephen's surprise present for their one-year wedding anniversary backfired when she injured herself.She said: "You know what, my husband organised a helicopter and this beautiful restaurant, but I actually got a trapped nerve in my hip, so I ended up staying and relaxing at the hotel! But we celebrated the next day with the helicopter and the lovely restaurant."