My daughter is currently 18months.  She has an older sister who is 3 and we also are expecting another baby in July.  We plan to move the 18month old in the same room with the 3 year old and they will be sleeping in bunk beds.  I'm fearful of this because the 3 year old transitioned very well however the 18 month old isn't quit as advanced as the 3y/o was at that age.  Also I'm worried about them keeping each other away at night and also at naps.  Has anyone ever been through this before or does anyone have any suggestions to ease the transition?  I plan to move her in about a month.

Thanks,

Amy