"Et tu, Brute?" ("You too, Brutus?" or "Even you, Brutus?") is a Latin phrase often used poetically to represent the last words of Julius Caesar. The quotation is widely used in Western culture as an epitome of betrayal.+[source]
You could have simply told me "Brute", I wouldn't have killed you, I wouldn't have totured you, I wouldn't have annoyed you,
Et Tu, Brute?! Et Tu!
Et Tu! the last thing I thought was .... Et Tu!