Who does queen casepoeia pffend the goddess thetis?

Cassiepeia the wife of Cepheus in Acthiopia,

and mother of Andromeda, whose beauty she extolled above that of

the Nereids. This pride became the cause of her misfortunes, for

Poseidon (whose wife Amphitrite was a Nereid) sent a monster into

the country which ravaged the land, and to which Andromeda was to

be sacrificed. But Perseus saved her life. According to other

accounts Cassiepeia boasted that she herself surpassed the Nereids

in beauty, and for this reason she was represented, when placed

among the stars, as turning backwards.