My 4yo daughter is worried about my wife, who is 15 weeks pregnant. She is suffering from morning sickness. My daughter thinks that Mummy isn't going to get better and it is starting to effect her behavior. She is usually a very well behaved little girl but recently her behavior has changed. She is very excited about becoming a big sister and we have tried to reassure her as much as we can that Mummy is ok and that it won't be forever just for a short while but this doesn't seem to be working. if anyone has any suggestions or advice as to how we can get over this bump in the road it would be greatly appreciated.