God of War (Legacy of Gods, #6) by Rina Kent

She wakes up to find she's married her worst enemy... and this villain says he's never letting her go.

From New York Times bestselling author Rina Kent comes the pulse-pounding conclusion to the Legacy of Gods series, a dark romance where obsession runs deep, enemies become lovers, and every secret comes at a cost.

Ava Nash thought she knew hate. She thought Eli King―cold, ruthless, emotionally untouchable―was her enemy. He broke her heart once, and she vowed never to let him close again.

But when she wakes in a hospital, confused and disoriented, Eli is there. Holding her hand. Wearing a ring that matches hers. Claiming they've been married for two years.