Jessica Simpson 'saddened beyond belief' when Nick Lachey started dating after their split

Jessica Simpson Reveals More ‘Dark’ Details About Divorce From Nick Lachey In Extended Memoir

Jessica Simpson Recalls Feeling "Saddened Beyond Belief" After Nick Lachey Moved on With Vanessa

Jessica Simpson Opens Up About Nick Lachey Divorce in New 'Open Book' Journal Entries (Exclusive)