Hell is Where the Heart Is by Eden Winters

Demon Prince Noorvik Metlakatla Hoonah Emmonak (“call me Vik”) likes his lack of responsibilities just fine. His mother, the Big Fucking Deal of the Sixth Level of Hell, longs for the tippity tap of tiny hooves and gives him two choices: find a mate within the next twenty-four human hours or settle for the demoness of her choice. Where can he find the ideal man on short notice, who’ll meet the mother-in-law from Hell’s approval?

Especially when he can’t have the only mate he wants.