Her first marriage ended violently: Agamemnon killed Tantalus and their newborn child and took Clytemnestra as his wife. Pausanias' local account remembers the earlier husband but disputes whether his father was Thyestes or Broteas.2Pseudo-Apollodorus · Pausanias — Epitome 2.15–16; Description of Greece 2.18.2, 2.22.3

In Homer, Clytemnestra initially resisted Aegisthus while a minstrel guarded her, then joined him after the singer was removed. Agamemnon's ghost calls her an accomplice in his murder and the direct killer of Cassandra.3Homer — Odyssey 3.250–310, 11.404–434⚖Told differently in other tellings — change the lens on the card

Apollodorus and Hyginus place Clytemnestra beside Aegisthus as a direct conspirator and killer of Agamemnon. Electra saved Orestes from them, and the grown son returned with Pylades to kill his mother and Aegisthus.4Pseudo-Apollodorus · Hyginus — Epitome 6.23–25; Fabulae 117, 119⚖Told differently in other tellings — change the lens on the card

Apollodorus places Iphigenia among the daughters born in Agamemnon's household. Pausanias reports an Argive tradition in which Helen bore Iphigenia to Theseus and entrusted the child to Clytemnestra to raise.5Pseudo-Apollodorus · Pausanias — Epitome 2.16; Description of Greece 2.22.6–7⚖Told differently in other tellings — change the lens on the card