Betrayed, So I Married the Ancestor

Centaur Sylvie is betrayed by her sister and husband, her rare foal switched, and her body thrown to Jörmungandr. Reborn and spurned by every male, she has seven days to bear a rare white foal or die. Her only shot is Chiron, the black Primordial Centaur in the forbidden zone. How will she take revenge and challenge the color-based caste this time?