E.B.
M.,
Wait until you get pregnant. Then tell her she is going to have a baby brother or baby sister. Let her be apart of the pregnancy. My daughter even had a dress picked out that she was going to wear to the hospital when she got to see her brother for the first time. My husband got her dressed in it and we took a picture of her holding her brother on her lap. She was so proud of being a big sister. I had trouble not being able to spend what I thought was enough time with her, because I was nursing her brother. She was fine, but my husband suggested that I take her out for a walk, just she and I, right after her brother nursed when my husband was home.
She and I went out to eat sometimes prior to her brother being born, so I made sure that her brother, her, and I went out to eat together. Often times, I tucked her in bed at night. We talked a bit, read a book, or said our prayers. This was a special time for us.
This way, if she ever shows jealously, you can remind her of your special times with her. Also let her know that her sibling is too little to take care of itself. Have your husband incorporated in the mix. My husband spent a lot of time with both of our children. My daughter and son have grown up to be very close to each other. They are both married, and still stay in contact, call each other, etc. My children are totally different from one another, but the bond is still there.
I also told my daughter she would always be my baby girl. Of course, that was after I had her brother.
Enjoy your expanding family.
E.:)