Kiss of a Duke by Erica Ridley

Just one more kiss… (Milady, it’s cold outside)

Lady chemist Penelope Mitchell took England by storm with Duke, a perfume for men that has women swooning at their feet. To prove the same aphrodisiacal potency of her upcoming version for ladies, the new perfume must cause a rake to fall in love with her in ten days. And she has just the man in mind…
Sexy pleasure-seeker Nicholas Pringle—known as “Saint Nick” for his wicked ways—wants to end the absurd cologne that has every young buck believing himself a ladies’ man. How hard can it be to charm a spinster into changing her mind? But when Penelope does the charming, this rakish scoundrel must decide between losing the war… or losing his heart.