My Stepmother Is a Little Human, or Marry a Dragon

I saved a newborn little dragon from an evil witch, and he called me “mother.” The real parent was not happy with such a turn of fate, because the dragon king had to take this “interloper” bride as his wife. Of course, neither was I eager to marry an arrogant tyrant. But what should I do if this is the only way to protect a small miracle from trouble?