They did not ask her any questions at the interview.
She showed over 200 pictures from our wedding. We had our whole family at our wedding and friends (120 people)
I guess that was sufficient enough to prove relationship.
We had also 2 years worth of phone bills .
45 min
Next day visa, after 2 PM.
In some cases , like my friend's wife it took 2 days for visa to be issued.
Also, they asked her a lot questions about her husband previous marriage, but everything else wet good. ( I guess it was Monday - for consul had bad sex over weekend