S.S.
Hi G.,
As the mom of a 12 yr old, 4 yr old and 18 month old all boys. I can tell you that no matter what you try there are going to be times when she will feel left out. I can suggest getting a baby doll and you holding and changing and doing things you would do with a newborn and involve her, but don't let her play with it. Include her in doctor' appointments and when the baby comes, bring her to the hospital. Once home just let her help and be involved to a point. It took a couple of days but he adjusted very well. He was 3 when the baby came, so you shouldn't have to hard of a time.
Good Luck!
S.
SAHM of 3 boys 12, 4 and 18 mths