Thanks for you suggestion, my friend. Actually I do have this option. I brought my mother in to live with us with a single-entry vistor VISA in June before our baby was born to help take care the baby and my wife.
The only problem is my wife, the new mom, doesn't want to leave our baby for more than 2 hours. (We try not to feed our baby with formula milk and she keeps breast-feeding our little one.)
I have a deal with my wife, if we don't get a call from local CIC by Friday, then we will go across the border on Saturday Nov 23, 2013. (leaving out kid with his grandmother for about 10 hours feeding him with formula milk).
Let's see what's the story ends up with.