The Duchess of Drury Lane by Janna MacGregor

She plays a part in society. He’s convinced she’s been miscast.

Raised to be a future duchess, Celeste Worsley must marry the duke her grandfather chooses for her. That means staying away from Malcolm Hollandale, one of the infamous self-made Millionaires of Mayfair. The only problem? He’s irresistible, completely unacceptable to her family, and she’s been in love with him since the first time she saw him.
On his hands and knees and covered in his newest attempt to varnish the Drury Lane stage, chemist Malcolm Hollandale tries to ignore the enticing woman everyone calls The Duchess. Celeste is everything he can’t have, but when she needs his help to right a wrong, he can’t refuse her or her plush red lips. A stolen moment leads to a forbidden love that neither can walk away from, but fate has other ideas. Yet, Malcom can’t stop thinking that perhaps this bold, passionate woman might be the perfect formula for achieving all his dreams.