suzan,i salute you for being a good mother and a provider to your son,you already have a good nanny as you say so,nobody in this forum who can feel the most if your nanny is trustworthy or not but yourself.who wants to be under surveilance 24hrs a day 7days a week? you'll make her uneasy working in your house,you yourself dont like to be watch by your boss every minutes of your working days,dont you? just treat her nice and fair and you'll get the same.accidents happens sometimes we can't avoid that,even your son is in your care,so i agree to labda06 if u can get her to a first aid classes will be a good idea,