VIII. Engr. Gilbert referred his friends, spouses Richard and Cindy Maylupa, to Atty. Jane for the institution of an action for partition of the estate of Richard's deceased father. In a letter, Atty. Jane promised to give Engr. Gilbert a commission equivalent to 15% of the attorney's fees she would receive from the spouses Maylupa. Atty. Jane, however, failed to pay Engr. Gilbert the promised commission despite already terminating the action for partition and receiving attorney's fees amounting to about P600,000.00. Engr. Gilbert repeatedly demanded payment of his commission but Atty. Jane ignored him. May Atty. Jane professionally or ethically promise a commission to Engr. Gilbert? Explain. (3%)