ASHLEE Simpson doesnt need to go to the gym now that shes a mom - she says running around after her baby son is enough to keep her in shape. The Melrose Place star says she was so busy looking after her baby Bronx that the weight just fell off her. I worked out for three months after having Bronx but now having to run around after him is enough of a work out, she said. Simpson - who is married to Fall Out Boy rocker Pete Wentz - recently revealed that doing yoga helped her bond with Bronx. Your body is changing, and its such an amazing time to feel that connection, she said. I did prenatal yoga, which was a nice way to mellow down and focus on me and Bronx. SS