Mary is a chartered financial analyst (CFA) and an investment advisor at a reputable firm. One of her long-term clients, Mr. Thompson, has decided to withdraw most of his investment to buy a new house. Intrigued by the potential returns, she proposes to Mr. Thompson a high-risk investment strategy that could double his remaining portfolio in a short time. Mary is aware that Mr. Thompson is nearing retirement and has limited experience with high-risk investments. However, she believes this strategy aligns with his previous investment goals, outlined in their agreement to pursue moderate growth but has since ignored these discussions.

Considering the CFA Institute's Code of Ethics and Standards of Professional Conduct, discuss the ethical considerations Mary must take into account regarding her duty to Mr. Thompson. What steps should she take to ensure her recommendations align with her obligations as a CFA charterholder?