Jessica Simpson felt more confident after having children. The 43-year-old star – who has Maxwell, 12, Ace, 11, and Birdie, six, with Eric Johnson – has revealed that she now feels more confident than she did in her 20s. Jessica told PEOPLE: “It wasn’t until I became a mother that I learned to celebrate what a woman’s body can do. “I am more confident now after three kids than I was at 25!” The blonde beauty launched The Jessica Simpson Collection in 2005, and she’s taken inspiration from various places – including from her own kids – for her own fashion line over the years. She said: “I get m…