[billysmommy]

I have to agree with the other posters.....just explain it as is. Any other children are your child's siblings, and should be referred to as just that. I think that as adults we sometimes don't give children enough credit - they grasp a lot more than most think. At least I know my children do. My children are 4 and 2, both placed as infants by the same first mom. At the time of both of their births she was parenting a son 15 months older than mine. Their brother has now been placed with a family member (long, complicated story) and I have had to explain that to them (well, the 4 year old - little one doesn't get it yet). I don't think it is that big an issue really. Parents place children for adoption for a multitude of reasons, and situations change.
I firmly believe in age appropriate honesty.