Ex-Husband won't sign

[Deren Huang]

I'll give a little bit of context and hope that someone can help me creatively think of a way to help.

Lady bought house before married, decently taken care of it, only outdated cosmetically, BUT massive foundation issues thus the distress. 

In the state of Oklahoma, husband must sign, they are still lawyering the divorce and only filed for the petition nothing decreed. 

BEST case: Cash for keys/signature

CREATIVE way around: Lease with Option and wait for the decree then purchase

Any other ideas on how to handle the situation?