Advice needed immediately for Visitor Visa!

[txrodeo]

Hey

I am in a weird situation. My spouse would be graduating from business school soon ( summer). I want my parents and my aunt & her daughter to attend the graduation ceremony. My parents have an appointment coming up this week for visa (Hyderabad consulate).
For my aunt (37 yrs - house wife, husband passed away recently) and cousin ( 14 yrs - attending school), is it wise for me to send visa papers? I am a PR. My aunt has son who just finished 12th class and waiting for admission letters from graduate schools in India.
Can he be included in the papers for visitors visa?
They have a set of sponsor papers from her sibling who is a citizen. those papers include all three of them (son, daughter and mother).
is it possible for only 2 of them to attend( mother and daughter only) while the I-134 mentions all three of them?
Is there any way out of this?

Thanks for your help in advance!

[immihelp]

You can sponsor anyone and any number of people as long as you can show that you can support them.