In Compromise with the Earl by Ava MacAdams

He has no time for games…She’s ready to play…

With her father leading a life of debauchery, Lady Aphrodite is the laughing stock of London. Still, she pretends to wear her reputation of a hoyden like a badge of honor.
Cheated on and humiliated across every acre of the Ton, Oswald Bristol, the Earl of Tennesley, needs to find a timid wife this time. But relying on a matchmaker seems more than ridiculous to him.
Except, an odd thing happens when the man who has spent his life being proper overhears a lady of loose morals calling him a bore. Determined not to let this slight pass, he takes it upon himself to prove her wrong. Even if that means putting her in greater danger than he realizes.