Hi, A.! I am a mother of girl/boy twins that are 33 mths old. What an experience! They are so neat, and so much work, but so worth it. Opening a forum, would be very helpful for you! Do you know what you are having? When are you due?
It will be helpful, since you have a 4 year old, because she will want to help. Just allow her to help out in any way that she can. It will let her not feel like she is being left out, and plus, you would be able to use the extra help.
I would be glad to answer any questions that you may have come up through pregnancy and during their growing up. I had a bad pregnancy, where I was sick from 2nd trimester until I went into labor at 29 weeks. I was on a lot of antibiotics, and my twins ended up being born with C-diff. Thankfully, they have almost outgrown it now. My son, who the docs thought would be a vanishing twin had a lot of GI (GastroIntestinal) problems, and was pretty ill the first 18 months of life. My daughter, other than having C-Diff, she out grew it at about 12-18 months old, she has been very healthy, except for the normal ear infections, but she does have allergies, pretty badly, but so do I and her paternal grandmother.
It is neat now that the twins are older, because the feed of each other. They do thrive being with each other, but again when one is sick, the other is down. It is like they know when something happens to one without being around each other, when that happens. Don't get me wrong they fight like any other siblings do, but they have a special bond. I would highly recommend that if they are in NICU at birth to demand they be in the same bed or able to touch each other, even when you get them home. We had 2 cribs, but we ended up putting them in the same bed, so I could get some sleep, because I was breastfeeding & pumping around the clock. It helped the first 3-4 months to keep them on a schedule, and a schedule I HIGHLY recommend. However, when my twins got a little older I put them in seperate rooms, because they weren't eating as much at night, and one would wake often in middle of the night, waking the other up, then after a month of that, we put them in seperate rooms, again I wise decision.
I would be glad to help you in anyway I can, feel free to email me at ____@____.com or ____@____.com luck to you, your husband and daughter, and the twins.