Kerry Washington is one protective mama bear. The Scandal alum, 47, recently gave her take on why she keeps her kids away from the Hollywood limelight. She and her husband, Nnamdi Asomugha, are guarded of their kids: daughter Isabelle, 10, son Caleb, 7, and a stepdaughter Anaiya, 18. (The teenager is Asomugha’s child from a…