They don't have anyone to leave Theo with if Meredith goes into labor in the middle of the night, so when they came to visit, Meredith asked Bob if he would come to CA. Of course, he said yes. I wish I could go, but didn't think my boss would love for me to take a vacation of an indeterminate length of time. LOL! I'll miss my baby, but will sacrifice him for a while to be with our little girl.
Here is a pic of Meredith, Billy and Theo. Aren't they beautiful?!