What does jealousy was Morgan Achilles heel in the green eyed monster mean?

The phrase "jealousy was Morgan's Achilles' heel" suggests that jealousy is Morgan's greatest weakness or vulnerability, much like Achilles' heel was his only point of vulnerability despite his overall strength. The term "green-eyed monster" refers to jealousy, often personified as a destructive and consuming force. Together, these phrases imply that Morgan's jealousy undermines her strengths and leads to her downfall, highlighting the powerful and often detrimental nature of envy.