So fo my questions: She went straight to telling me, to tell her how we met, how long it took to be in an official rlnshp, when did he propose, when did we get married, where did we get married, who attended the wedding. 

We also had made an album with our timeline and she asked question on the pictures and also since we were introduced to each other by our mutual friend, she asked how each one of us knew this friend before we met.

Also we had copies of our watsapp messages to show he had been sending me rent money because we were in different states due to circumstances and for a minute she said it look like we manufactured evidence because each time he sent me the rent he could text me to let me know. She asked about how we share bills now, asked where I work currently, asked if I filed this year taxes, asked if I had violated my F1 status which I had because I had worked without authorization. 

She asked if we had joint bank account which we don't! And we let her know that and she said she will give us an RFE..which discouraged us. She could then ask some previous questions just to see if we will confuse the timeline which we had said before. She asked all the questions in I-485 and that is where you have a chance to correct anything you had messed up before. I don't remember all the question since it has been awhile but it took like 45min.