How to Summon a Fairy Godmother: A Laugh-Out-Loud Fairytale What-If (Fairies and Familiars #1) by Laura J. Mayo

If a fairy godmother can get one sister into a marriage, getting another out of one should be easy… 

Lady Theodosia Balfour is screwed—with the Balfour estate on the verge of bankruptcy, and Theo’s royal stepsister spreading wicked rumors about her, Theo's only path forward seems to be a forced betrothal a foul-tempered geezer who wishes only to use her as a brood mare. 

Desperate for help, Theo clings to the only thing that might save her: the rumor of a fairy godmother. And after discovering a way to summon one, Theo thinks her prayers have been answered. But the fairy she meets isn't at all what she imagined. Drop-dead gorgeous and slightly devious, Cecily of the Ash Fairies is much more interested in smoking her pipe than providing charitable magic to . Now, Theo must prove she’s good to gain Cecily’s trust (and magic), but proving goodness doesn’t seem to be all that easy. In fact, it all seems to be rather ridiculous…