Time to put the dream in action??

At what point in life is it time to say the dream should die? As a Mom of two and a wife I can't decide if I should be selfish and make the leap and head back to school. I have always regretted that I did not get a college degree and was often heard saying that before I die I want a degree. Is it too late now??
This is the question I am pondering at the moment, I will definitely update if I ever come to an answer.

Cheers