The Princess and the Frog

From the introduction: Once upon a time, Allandrea, fifth daughter of King Alofell, faced with being married off to some minor baronet, appealed to her Fairy Godmother to improve her lot. Eager to help in the traditional manner the Fairy Godmother granted the power to convert a frog to a prince with a kiss. So far so fairy-tale. Complications arose when Allandrea realized a prince without a princedom was not really what she desired. She also realised her magical power was not limited to a single use... Absconding, she has located the neglected temple of a Frog-God where she endeavours to create an army of Frog Princes sufficient to seize control of the kingdom.