Actually my Perth counsellor told me to read it as a bed time story. Or when they ask about having another sibling if he doesn't have one. I think I will ask for professional help when the time comes. DH is actually quite sad for the idea that people would know after the kid goes to school. And friends kids know about it too. He is still feeling sad about not being able to have a bio child. On the other hand, one can tell the child in a different way that not everyone needs to know. No intention to hide but not making it too special either. That's what the counsellor told me. Also at that age, children might be more interested in toys than talking about making babies.