Does wife of joint sponsor need to sign also? (islamabad)

[El_killer47 22]

We need a jointsponsor. We were told that at the embassy at the interview.

I have a friend who is willing to be our sponsor. In 2012, 2013, 2014 he made approximately $90k/ year. In 2015, mid year he switched jobs and got an even better job, with a base of $150k plus bonus. That's his situation right now.

So everything looks great except the issue his, his wife doesn't want to sign the i-864A as she doesn't know me. His wife earns about $90k and they filed 2014 taxes jointly. 2012, and 2013 were filed separately by my friend as single.

He can be our joint sponsor alone, but my concern is, will the CO at Islamabad ask for an i-864A from his wife since the 2014 taxes are filed jointly?

What if, we just send an i-864 signed by my friend where we mention the income listed on 1040, $170k (combined) and then attach his w2's only reflecting his income only, 3 recent paystubs from the new job and a job letter from his new job stating his base salary of $150k.

Will this be enough? Or will the CO at Islamabad further delay our case and ask for an i864-A from my friend's wife? Anyone with experience, please help. Thanks.