Carnal: The Beast Who Loved Me by Victoria Danann

The rogue angel, Kellareal, stopped the genocide of a hundred and forty three human/animal hybrids who’d been genetically engineered as an experiment. Generations had spent their entire lives imprisoned and used as research subjects. Against orders, he spirited them away to another world. In a twist of irony, they were given the job of protecting humans from the result of their own hybrid experiment gone very, very wrong.

When Rosie Storm asked Kellareal for a place to hide and teach her boyfriend a lesson, she thought she was getting a few weeks of tantrum-fueled asylum. The last thing she was expecting was to be the accidental architect of a war. Or to meet someone like Carnal.