Theyll never meet there father?

i just lost my husband in iraq and im about 2 months from giving brth to his twin daughters i just am a bloody mess i have no family the only people i can talk to is the military services they are offering please tell me what im supposed to tell these two little girls when the time comes how do u tell two kids thery will never meet the man that gave them life and never get to have that special daughter father relationship how they lost the one man that will never hurt them or break there heart i lost the man i luv and i see them as gifts from him but i still dont know what im gonna do when that time comes that i have to tell them theyll never get to see daddy all theyll have is me its gonna be hard but i know when they come it will be because of him right??? i know when i see them crawling around ill think of him i know they will resemble the very man who gve them the life they will live but please someone tell me what im supposed to do i have no one