She was speaking at London's Vogue Festival at Royal Festival Hall earlier today, before an audience of fashionistas.
Accompanied by her eldest son Brooklyn, Victoria, 39, said: "I think you feel so torn, don't you? But I've got great people who handle my schedule and everything does revolve around the children.
"So, if there's a parents' night or an Easter bonnet parade or a nativity play, whatever it might be, then I plan everything around that so I can always be there.
She also confessed that being a mother means she does not get enough sleep, saying: "I'm up early in the morning with the kids, getting the kids ready for school, going through the times tables tests and spelling tests and all that kind of thing, which I'm sure every mum is used to doing early in the morning.
"But then I'm also up quite late at night because I have a baby and then I have a 14-year-old who refuses to go to bed... Brooklyn."
Famous for always looking glum and never smiling in photographs, Victoria joked: "Everyone thinks I'm going to be such a cow - I get it because I think the same when I see the pictures."
She told the audience of fashion followers, many of whom had queued for two hours: "There's a lot of people here, I hope I'm going to say something good now
"I've always wanted to be involved in the fashion industry, I felt it in my tummy.
"At the beginning there was a lot of raised eyebrows, or those that could raise their eyebrows," she laughed. "When I started, I did one-on-one presentations, I'd talk for hours to people who didn't even speak English.
"I think a lot of people probably thought, "Shut up, stop going on about a bloody grosgrain waistband!"'
She admitted she could be 'a complete pain in the neck'. "I'm a perfectionist, I like everything to be right. I'm probably a complete pain in the neck to work with because it is really important to me because I've grown this brand from nothing to where it is now."
She now shows her fashion collection at New York Fashion Week. She said: "I'd never say never to showing in London, but I've got a great thing going in New York. Maybe one day.'
Answering questions from the audience, she said her mother Jacqueline has been her role model.
"My mum loved fashion, was always very glamorous and has been married to my dad for a million years and looking after three children, and that's really inspiring," she said.
She also said she was enjoying life back in London after the Beckham family's years in the US, even though husband David Beckham is playing for Paris St Germain.
"Living in London is very, very different from Los Angeles, but it's great, it's inspiring. London is such an inspiring place to live, so multicultural, it's interesting, I'm happy," she said.