Hippodameia, like her other forty-nine sisters and half-sisters married the fifty sons of Aegyptus. The night of her wedding Hippodameia along with forty-eight of her forty-nine sisters killed her husband with a dagger provided to her by her father. Hippodameia's victaim Istros
When Hippodameia and the other Danaids who had murdered their husbands they were sent to Tartarus and were forced to carry water from the river Styx in a bowls (or jars according to some) with holes over to a tub which leaks at multiple parts. Hippodameia and the others were told only when they filled the tub could they wash away their sins. The Danaids continue this essentially impossible task to this very day.
Danaus & Atlanteia or Phoibe
Spouse & Lovers
"[The daughters of Danaus married the sons of Aigyptos:] Hippodameia went to Istros, Rhodia to Khalkodon, Kleopatra to Agenor, Asteria to Khaetos, Phylodameia to Diokorystos, Glauke to Alkes, Hippomedousa to Alkmenor, Gorge to Hippothous, Iphimedousa to Eukhenor, and Rhode to Hippolytos. These ten sons had an Arabian mother, while the girls were the daughters variously of Atlanteia and Phoibe, two Hamadryas Nymphai."
- Pseudo-Apollodorus, Bibliotheca 2. 17 (trans. Aldrich) (Greek mythographer C2nd A.D.)