I'll say; "No biggie?". My Mother used to get calls all hours of the night. She even got up, got dressed and went off to hospitals to pray for people who called her in need.
I don't know about Mr. Cain. I can only speak about my late Mother but being a minister is a 24hr job.
He is merely an associate minister. He personally took her cause up it seems, according to him. Was she a member of the church? Even his own church does not agree with his political philosophy at least as far as the senior pastor is concerned. I respect that people take that route in life. What if there is more proof in gifts and trips, etc. that comes out? I am concerned they are withholding information and proof so that he can publicly make a fool out of himself. Nevertheless, his choice in “friends” as he called her is rather suspect at best - in my opinion of course.