More Than A Rogue by Sophie Barnes

Emily Howard knows she is destined to be a spinster. She has accepted this fate, but that doesn’t stop her from wanting to experience kissing. What she doesn’t expect, is for Griffin Crawford, the handsomest man in the world, to do the honors. Or for all her female relations to discover her in his embrace. Naturally, marriage is instantly mentioned, but since Emily knows this is not what Griffin wants, she tries to escape him, her family and the ensuing scandal.
When Emily flees the Camberly ball in the wake of their kiss, Griffin goes in pursuit. He will not allow his sister-in-law’s determined friend to risk her safety for any reason. And risk it she will if she means to return to her countryside home by herself. But the longer he remains in her company, the more he is tempted to kiss her again. If only he could risk falling in love and remain in England forever.