Warlord Sky by Cynthia Sax

No one grounds a barbarian warrior.
Qulpa, a Chamele warrior, lost everyone he loved in the brutal Succession Wars. Flying is the only thing that brings him joy. Serving as his team’s pilot is the sole duty he has left. Then a horrific crash leaves him injured and unable to fly.
The one being who can help him is also his gerel, the female destined to be his. She insists she doesn’t feel their connection. Qulpa is certain his beautiful mate is lying and nothing will stop him from finding out why.
Nayan knows the injured barbarian is her warrior, her one chance at a forever bond. His dominance makes her feel safe. His gentle touch inflames her passion. His kisses scorch her very soul. The tall muscular male tempts her as no one else has.
But she has a deadly secret. If it’s exposed, her injured male will lose more than his ability to fly. Both of them will die. She can’t take that risk, not for him, not for them, not for a lifespan filled with love.