Did I Earn an A?

Dear Law School Ethicist;

As a first year student I fell head over heels in love with Civil Procedure and, by the way, my professor. We had intimate relations. He was not married, nor am I. After a couple of months we realized we should not be involved.

My final grade was A. That would be fine because I studied hard and, after all, got some private tutoring. The problem is that I left half the test blank. I suspect the A was awarded because of some sense of gratitude or kindness.

If I do not go to the Dean and tell him the whole story and petition for my grade to be reduced to a B or C, have I violated the honor code? Thanks in advance for your answer.

Linda