karachiite

Houston, TX also has Pakistani consulate, Passport renewal or NICOP and what not can be done there too.
(depends which city you live)

No ,its not necessary, it has no value in USA.
If you want you can get it, Pakistani born US nationals usually use it ,when they go Pakistan on US passport ,they donot need to pay visa fee.

I have submitted so many documents such as
1:- attested copy of Birth Certificate
2:- copy of the Green card
3:- Original "B - Form"
4:- . Attested copy of Marriage Certificate with a copy of attested true translation in English
5:- Family Pictures
6:- Affidavit
7:- Birthday Cards
So many other documents as well that's related to my Son. Complete Documents package weight is approximately 1 KG.

did they give you any paper or anything or send email with instructions, what to do next?
or time frame ,how long you have to submit documents.
if not call embassy and ask them.

to prove domicile in USA she can provide copy of her one or more of these
tax returns
bank account in US bank
utility bill on her name
if she works, letter of employment.

Call the NVC, they're the best ones to answer this?

Ok, thanks