Claiming the Beast by Holly Roberds — book slip

Miranda West's sentient blade once killed gods. To resurrect her lost love Xander, she shattered the prison holding every immortal the sword ever trapped.

Now she must hunt them across Las Vegas with Xander, who has returned broken and sliding into madness. A spell chains them together, reigniting their fierce, competitive passion.

While she shields her son from a charming neighbor's interest, the gods' grand ball erupts into a coup led by Seth, whom she slays.

The true enemy is the sun god Aten, who reveals himself as her neighbor, kidnaps her family, and demands her obedience.

In a final, cataclysmic battle, Xander embraces his full godhood and madness, fighting Aten long enough for Miranda to strike them both down with her blade.