We can upload her driver's license and college and bank mail that she received at her mam's apartment address, and for my joint sponsor (mother-in-law), we can upload the apartment lease and driver's license and mail.
Knowing that the NVC only asked for domicile proof from my joint sponsor, not my wife, we are planning to stay with my mother-in-law temporarily.
Could that work as proof?
Thank you all for your answers.