H1b transfer


I have a complex situation and need assistance ASAP.

My wife came to US in Dec on H1b visa and her employer didnt generate paystubs due to no project.

Then I filed for H4 in march which is still under process.

Now she got the offer with new company and they are asking for paystubs.

What is the best way to handle this as she dont want to lose the opportunity with new company.

Please suggest ASAP.