Jessica Simpson may have the freedom to date and do whatever she likes, but her sister Ashlee is just fine being a married 24-year-old mom. In an interview with Redbook (via PEOPLE), Ashlee Simpson-Wentz says that she's "grown up so much" since having son Bronx last November. She calls being a mother "so empowering and incredible," saying that she's "one of those people who believes that life brings things to you at a certain time for a certain reason, and if you just go with it, that's where the best moments come from."