How to acclimate a Maltese with twin babies?

I'm 33.5 weeks pregnant with twins and need help with training my beloved Maltese to accept our new additions.

Ike, the Maltese, is a very loving dog but has never been around children of any age. We have had a couple of friends over with their kids and he goes crazy. Jumping, barking, licking, all the "bad" behaviors that you don't want to become habits. I don't know how to train him for the arrival of his brother and sister, which is only a few weeks away. Any suggestions?