Carla Morales attends her best friend's magic-themed wedding and ends up becoming a futa.
She doesn't expect much when she goes over to the witch her friend hired as entertainment. Carla is a stubborn woman, so when the 'Mystical Lucinda' challenges her to drink a potion, she does it.
Tina Jackson is Carla's best friend's sister, and she gets caught in Carla's web of disaster when she goes over to Lucinda's table with her. Tina likes Carla and thinks Carla is cute, but Tina is prude and afraid of her own feelings.
At least until the potion takes effect.
Unintended Consequences is a magical trans lesbian romance.