Quoting Ducky's Mommy!:" I was engaged when i got pregnant and the baby was planned but BD and i are no longer together because ... [snip!] ... time. I dont know how i will explain this to LO when LO reads it someday if his or her whole life daddy has not been around."
I've kind of got a similar situation going on, my BD bailed two weeks after he found out, even though at first he claimed to be excited. It's something I always wonder about, and my mom has really helped me come up with a solution that I'm pleased with. When the time comes, I'll explain to him that he has two kinds of daddies but the daddy who put him in mommies tummy, isn't the same daddy as he always sees and plays with. Once old enough, I'll be able to explain biology, but, you can't explain biology to your young child. I filled out my baby book with the biological fathers information so he has some idea as to where he comes from.