As per I-130 Instructions Page 1 Note: 1
"
NOTE:
If you are filing for your spouse, he or she must complete and sign Form I-130A, Supplemental Information for Spouse Beneficiary. If your spouse is overseas, Form I-130A must still be completed, but your spouse does not have to sign Form I-130A. Form I-130A must be submitted with Form I-130. "
As per above Note I think Your spouse don't have to sign the form if you are filing for her from USA
You can down load the instruction form here https://www.uscis.gov/i-130
Mozan got a reaction from SandM0812 in Additional Information for I130A