"You are NOT the best mother EVER!"

Just wanted to report that my dear 2 1/2 year old daughter has determined that I am not the best mother ever.  She told me this yesterday as I fought her into her car seat.  "You are NOT the best mother EVER!" she screamed and proceeded to cry for the next 10 minutes because I wouldn't let her sit in her big sister's car seat (it's a seat belt booster).  For those of you who were wondering if they were the best mother ever, you are still in the running because I have not taken that position:)  On a side note, the same 2 1/2 year old has used the potty twice in the last 24 hours.