Short sale of home bought before marriage

[Rafael Floresta]

I am in contract in a short sale with a seller who bought a house before he got married. 

He is now deep underwater and wants to shortsale. He is still legally married but separated. He doesnt work, he is a veteran and his wife claims head of the househould.

I just spoke with his current wife/ ex wife and she is reluctant to give the bank their W2. 

I recommended her to check with the short sale attorney if there will be any repercussion on her credit from providing that document. The bank just wants a proof that the guy doesnt have money. 

Any tips and tricks to help this situation better or should I just walk away?