Naveen, from my experience, I think it would be better to tell them the truth. Yes, the other side of the story could sound reasonable, but if I were you, I would tell as it is. I told two of my brothers were here; the consular just asked what does the other one (one of them was my sponsor, so they knew about him) do, and that was it. I think you just have to prove your case strong more than your family's. I don't know, but I think their denying the visa and giving the reason as the applicant may not return from the US is just a an easy cliche to deny one. But again, like infinityplus1 said, it is up to you what to mention and what not to mention. Good luck! :)