Dave,
I love that quote and it is so true. 
Bert, 
I know you...try not to take this personally.  She is taking it out on you because she has to deal with a sick, cranky kid who is messing up her weekend plans.  When my server was down for 10 days, 99% of my patients were understanding and patient.  But there were one or two that thought it was my fault and I did it on purpose.  You are a great guy, a great pediatrician and a good friend.    I usually make myself feel better in these situations by thinking how much worse the patient will be when they change to another practice.