Yes we all make mistakes - defined as "to blunder in a choice or make an error in something" but then we can make stupid mistakes ' defined as "the state of being foolish and unintelligent". She did not make a mistake - she showed utter stupidity. She chose to drink and drive and then text, which compounded the problem. She may be a good teacher - but she set a sorry example to students and parents alike and for that she must suffer the consequences.
And to respond another way - I am 54, don't drink and drive (don't drink period) and I don't do texting.
More information about formatting options