They are jerks, kidnapping Sarah to have sex against her will for the purpose of breeding.
How would the Bajorans retcon this into being something grand.. it would be like the holy spirit impregnates unwed teenager deal. At least Mary got two millennia of veneration for her trouble. Sarah had to flee to Australia (typical) and then got killed off. They did not care about their precious vessel one bit, she had all the value of a jam jar.
and on top of the unethical part of it, it really added nothing significant to the story or to Sisko's character. A completely unnecessary and rather unpleasant retcon.