Thank you, thank you, thank you everyone. I have been very age-appropriately honest with him, and he is surrounded by a lot of healthy love. Plus, I never say anything bad about his AD in front of him. I'm just really sad for him that he won't have a "normal" upbringing, since I will probably never get married. However...here's a silver lining story: My brother's girlfriend is currently pregnant (yay! baby niece for Auntie Renee!), and they visited us last week. Well, my son fell in absolute love with my bro's gf. He told her he was going to build a hospital for her, and that he would take care of her and the baby. These are words he NEVER heard come out of his father's mouth, that came directly from his sweet, dear six year old heart.