Under a Blood Moon by Delilah Devlin

In Jefferson Parish, deep in the bayou, is a place called Bonne Nuit. Off the beaten path, isolated by swamp and connected to the sea, there the Beaux Rêve Coven thrives. Five witches… Too many demons to count…

Now that the battle dust has settled and the witches have won their freedom, Miren Lynch is going stir crazy. Sure, her three demon bodyguards are hot–especially Renner Neilsen–but having them constantly underfoot and ordering her around is about to drive her insane.
One kiss proves the attraction between her and Renner is mutual, but when the sea draugr slips into her dreams, he ignites a fire only three demons can quench.
To Renner, it makes perfect sense for Miren to choose him for her mate. They share the same element–water. They’re both wildly attracted. But once he sneaks into her dream to seduce her, she doesn’t trust his promise he won’t abuse the power a witch brings to a mate.
His solution? Show her he will provide everything she needs for her wellbeing–from mind-blowing pleasure to her treasured freedom–even if it means sharing her with a pair of handsome and lusty mermen twins.
One demon lights her fire. It’ll take three to cool her down.