Adjustment of Status - I-485

Me and my wife USC had our first interview in middle of september 2019, interview duration was around 45 minutes, we thought interview went well and we brought enough evidence. At the end of interview officer said that our case will be reviewed, did not gave us any timeframe. Few days ago we got notice from local USCIS office that we will have second interview and list of documents to bring(same documents that we already submitted and showed at the interview). Only problem is, in listed doxuments USCIS is asking for most recent paystubs from sponsor and co-sponsor, W2’s and Taxt Return Transcripts. Because at the moment wheb we married my wife sid not met the requirements we asked her friend to be my co-sponsor, she agreed an that and we filled the form and got all supporting documents, but that was last year(2018). This year her friend provided us only W2 Copy and bank statements right before our first interview in september. Now my wife and her friend stopped communication for various reasons, so we can’t ask her to provide Tax Return form and more recent documentation. But after we got married me and my wife filled taxes jointly, and it shows that our ijoint income was more than enough to meet the requirements. Questin: can we fill new sponsor form I-864 for my wife and show on it our new income, so my wife will meet requirements to be my sponsor? If so, could you give some more information on how to do that? Thank you.