It means that your mind is mourning for your daughter and is picturing itself jealous of your unborn baby because the child will take place of your daughter.
It might also be your daughter visiting you in your dreams and asking that you don't forget her when your new baby is born; and your conscious perceives this as 'jealousy.'
Several possibilities. Just never forget your daughter. She's obviously still really close to you in a spiritual sense.
You know I will look into this and find out but I agree with Shoofly on this and lovetovent. And don is a douche
It means your catholic.