Laywer, Son & Ethics

"Suppose son, that one day a gentleman comes into my office with
a simple question. Upon answering the man's question, I charge
him $100.00. He is outraged at the bill for such a simple
question but agrees to pay. The man reaches in his wallet and
grabs a hundred dollar bill and thrusts the money into my hand.
Upon his leaving, I notice that the man has, in fact, given me
two $100.00 bills."


Now the ethical question, "Do I share that money with my
partner?"