The Mating Magic by Bonnie Vanak

One desperate dragon with a crippled wing and one stolen potion granting powerful magic equals one furious, immortal wizard who wants it back.

All Evie ever wanted was to fly like other dragons, and win the heart of sexy dragon Chase Burke. After she’s snubbed by Chase’s wealthy family at an elegant society ball, her sister Lacey concocts a powerful potion to give Evie magick beyond her wildest dreams. The problem is, Lacey stole the ingredients from the immortal Coldfire Wizard and now an infuriated Drust wants it back or there will be hell to pay.
Chase Burke has secretly loved Evie, but pressured by family demands, must hide his true feelings. To grant Evie’s dearest desire, he’s apprenticed himself to the Coldfire Wizard. But when Chase accidentally consumes the immortal elixir and becomes as powerful as Drust himself, he threatens the welfare of every fire-breathing dragon on earth. Evie and Lacey must find a cure for Chase before Drust is forced to exterminate him, or Chase threatens to destroy everything in his path, including those he loves…