Does everyone believe that half-siblings should be on the same "level" (for lack of a better word) as full siblings? I'm not comfortable using "brother or sister" for my bs when talking about his half-sister. I would never discourage a relationship between them. I don't correct her or other people when they say "brother or sister", but I don't really like it. I always say half- when discussing it. I don't want people thinking that her BM could be my BS mother! I'm pregnant with our second and I just feel like that is his brother or sister (find out soon!) not SD.