My grandmother always used to say the baby comes when the baby wants to come. Don't worry, she'll be here before you know it! My son was born 6 weeks premature. At the time we had a Scotty dog, everyone said we were going to have all kinds of problems with the dog once the baby came. The day we brought our baby home from the hospital, I sat with him on the floor & the dog came over. As the dog sniffed at the baby, I told him Michael was part of the family just like he was and I'd need his help taking care of the baby. From the start there were no problems and as Michael grew they were best friends. Maybe something like that would help with Ally, assure her that she's not being replaced and you'll need her to help out a bit.