The pair are raising raising three kids together: daughter Jagger, 10, and son Ziggy, 4, plus son Bronx, 16, whose father is her ex, Fall Out Boy’s Pete Wentz "We continue to grow together," Simpson ...

Simpson tells PEOPLE about her "open and honest" relationship with Ross, with whom she's raising three kids: Bronx, Jagger and Ziggy Ashlee Simpson is opening up about the rule that keeps her marriage ...