Mestra

[3] Mestra was the mother of King Eurypylus of Cos by Poseidon.

[5] Mestra had the ability to change her shape at will, a gift of her rapist Poseidon according to Ovid.

[6] Erysichthon exploited this gift in order to sate the insatiable hunger with which he had been cursed by Demeter for violating a grove sacred to the goddess.

Mestra's great-granduncle Sisyphus also hoped to win her as a bride for his son Glaucus although that marriage did not take place.

Ultimately, Poseidon carried away Mestra to the island of Cos.[11]"And earth-shaking Poseidon overpowered herfar from her father, carrying her over the wine-dark seain sea-girt Cos, clever though she was;there she bore Eurypylus, commander of many people."

Erysichthon sells his daughter Mestra. An engraving from among Johann Wilhelm Baur 's illustrations of Ovid's Metamorphoses . Poseidon can be seen in the lower-left background.