Fire and Desire by Angel Nyx:
https://books2read.com/b/3JVaVJ
What happens when a Phoenix and a Griffin fall in love despite a centuries-long feud between their families? Sparks fly and passions burn hotter than ever.
For nearly three centuries, the MacLellans and the Adairs have feuded. It’s been so long, no one even remembers what started it. When fate brings Kyleigh Maclellan and Lauchlan Adair together, not once but repeatedly, can the love that develops between them be enough to heal the rift, or will their families hatred of one another tear them apart?