Parallel Pain by Sara Summers

With Vaughn captured and both of them feeling the painful effects of his training thanks to their merge, Adrie Lane has three options:
1. Wait for the Medina group to accept his newfound control and release him
2. Track down Stella and demand answers and assistance
3. Destroy everything and everyone keeping them apart.
Even with the assistance of the most powerful reaper and faerie on the planet, she’s leaning toward option three. The Medina group has no idea what’s about to hit them.