The 36-year-old singer-turned-fashion designer – who has three children, Brooklyn, 11, Romeo, seven, and Cruz, five, with soccer star David Beckham – is very strict with her kids but has never "physically" punished them for bad behaviour.
She is quoted by the Daily Mirror newspaper as saying: "We watch movies together as a family and invite guests too. We are also very strict about the children doing their homework and going to bed on time.
"Cruz goes to bed at 7pm, Romeo goes at 7.30pm and Brooklyn at 9.30pm. I firmly believe that children need a basic routine.
"We have got a punishment chair – when you've done something naughty you are supposed to sit down on it and think over your behaviour. But I have never had to punish them physically.
"I think they are all very clever boys and besides they've got very good manners."
The former Spice Girl also lifted the lid on her relationship with husband David, insisting he is her "best friend".
She said: "We are as in love, if not more in love than ever. We are best friends. We never put pressure on each other.
"It was our 11th wedding anniversary at the weekend and we celebrated it in style. People assume I don't drink but I'm only human and I can get p***ed and get hangovers like everybody else. But it was a fabulous party."