Cathy,
I'm happy for you and Jeremy. As you said, it should be adventure. I was at a christening of twins today, grandsons of a friend of mine. They are now 9 months old. Brian and Shelly had a two year old girl, when the twins were born. Shelly said that was the hardest part, trying to show her enough attention, while caring for the twins. So it sounds like it'll be easy for you and Jeremy. I'm sure you'll have your family's support.