So then by your definition you value the life of your children more than yours. You would rather expose yourself to danger then them. But your example is kind of limited. If a truck was coming down the road high speed and you needed to jump in front of that truck and die to save them, and you had three minutes to decide, would you jump and die? If you did this (by rational thought)I believe (at least at that moment) the value of your life is actually secondary to the value of their lives. Isn't it? Would your life therefore ultimately be your highest value? Seems like an Objectivist paradox to me.
Also, you note that protecting (or saving) your children is nor moral behavior. If this is not moral behavior what is it and why?
Thanks.