The Devil You Know — Lily Vega

Natalie Owens agrees to perform a sex magic ritual to help her crush, dreamy Ben Nixon, summon a familiar. Being just friends with Ben after a night of magically enhanced sex will be next to impossible, but the hot steamy encounter might be enough to stop her ex-husband's new fiancée from playing matchmaker.

But instead of a familiar, they summon a naked lust demon -- who seems to know Natalie.