The Butler, the Husband, the Wife and Her Mother - S1-E6
Continuity mistake: When Sylivia is telling Fran about her birth, she raises her right hand and has her left hand on her hip. When the shot changes her left hand is raised and her right hand is on her hip.
Answer: Mr. Sheffield needed someone to manage the kids, not necessarily babysit them. Brighton was a Bart Simpson type, Maggie was shy and awkward and Gracie had personality issues.