Final answer:
Phaedra from Greek mythology fell in love with Hippolytus, her stepson. This unreciprocated love leads to the tragic outcomes that underscore her mythical tale. The correct answer is Hippolytus.
Step-by-step explanation:
Phaedra, a character from Greek mythology, fell in love with her stepson, Hippolytus. This unrequited love is a central theme in various stories and plays, where Phaedra's passion leads to tragic circumstances. Hippolytus, known for his staunch chastity, rejects Phaedra's advances, resulting in a series of unfortunate events that drive the narrative of the myth.
Despite being married to Theseus, the Athenian hero famed for slaying King Minos's Minotaur, Phaedra's heart is consumed by her illicit love for Hippolytus. Theseus, her husband, is not the object of her affection, nor are Aegeus, Theseus's father, or Poseidon, the sea god who we see causing turmoil for other characters in Greek mythology, such as Cassiopeia and her husband King Cepheus.