Change of duration of the stay. Help!

[smartcookie]

I was granted a 10 yrs multiple entry visa last month at Chennai consulate. During my interview I had mentioned that I want to stay in the US for a month but now plans have changed. My parents are travelling with me and initially it was decided that I get back in 1 month coz I have to get back to work and my parents stay for 4 months. Now they have decided to stay only for 2 months and we all come back to India together. My workplace has granted extra 1 month leave.
Is this going to be a problem at the immigration port? Since I had mentioned I wanted to stay for only a month and now want to stay for 2 months or am I just getting paranoid?

[orion]

You will be fine, most probably you all will get a stay of 6 months.