sara martin , from lititz , pa. , had n't spoken for weeks after health declined .
but one day recently , the dying mother-of-three uttered the word : ` florida '
now , devoted family is driving her there for what will likely be final holiday .
they are leaving for the city of sarasota in south-west florida in rv today .
mrs martin , 37 , was diagnosed with inoperable brain cancer five years ago .
she is married and has three children ; carlie , 12 , gretchen , 11 , connor , 9 .
she has not spoken again and has been told she does n't have long to live .