Sinful Persuasion of a Lady in the Making by Ava MacAdams

Temptation is a dangerous thing…

After her brother’s marriage into nobility, Miss Jenny Jones enters the Season. And despite her struggle to shake off her life as a maid, the wagging tongues are relentless. For, her mother was a prostitute.
Sebastian Nicholes, the Viscount of Hartwood, is probably the most hated man in London. Drinking away his guilt for his parents’ deaths and his sister’s damaged life, gossip sticks to him like a second skin. Until the day he meets a lady that sets his soul and the rest of the world on fire.
But her label as the prostitute’s daughter is not the only thing haunting Jenny. Her happiness turns to ashes in her mouth when threatening letters start appearing wherever she goes, and Sebastian becomes a target. Revenge, they say, is a dish best served cold. And this one has been waiting in the frost of darkness for far too long…