I spoke with my lawyer today and advised me that you have visited your wife in India for month and half which is a good thing . And advised me to write simple cover letter.
He advised me to submit following documents
1) Visa,tickets information, boarding passes
2) pictures have taken with family and friends
3) any places or activity done together.
What laywer explained me is that you visited your wife is a good thing. This clears any question if immigration officer has in his mind. He explained me write a subject `Submission of fresh documents`.
They better hurry or i am gonna have multiple babies coming as well as...
As long as you submit documents that do not jeapordize your situation. In my case more the merrier.
Thanks