Hi everyone, my brother is applying for IR5 visa to bring my parents here. Their I130 was approved, my brother is filling form I864, his tax return is filled jointly with his wife and their household size is 3, total income is around $40k. So he has a co-sign sponsor but the co-sign sponsor is co-signing for another case, her income is around $60k and her tax return is filled jointly with her husband (he's retired).
is the co-sign sponsor qualified to co-sign for 2 more people? Does my brother's wife need to fill form I864A?
We appreciate for your help!