Visitor Visa - B2

Mother got Visitors visa very easily. We had applied for visa for my mother and she is a govt employee. The VO did not ask for any documents but they had carried all the docs mentioned by immihelp. She got 10 years visa in first attempt itself. Thanks to immihelp follow the instructions provided by immihelp.
Following are the questions asked to my mother
1. How many children do u have and what r they doing?
2. Where are you working?
3. Where is your husband working?
4. Why is he not travelling with u?
5. Is your leave approved?
   When she was about to show the NOC letter for leave the VO told your leave is approved.

I had prepared my mother with many questions from immihelp and also from others experience which was useful but I never made my mother panic. So she was confident in attending the interview.
On the same day many applications were getting rejected even for some who were in second attempt.
Never mention that you are pregnant anywhere.