Never Deceive a Viscount by Renee Ann Miller

They are the infamous lords, notorious noblemen who indulge their irreverence in public, but keep their personal struggles private. For a portrait artist, capturing the true soul of a high-born hellion is a daring proposition…
Clearly, Emma Trafford’s new neighbor is a lady killer—but is the scoundrel with the scar capable of murder? Emma can barely contain her precocious younger sister, Lily—the child swears she spied their neighbor engaged in foul play in his Bloomsbury love nest. But when Lily goes too far searching for “evidence,” Emma must save the imp by distracting Simon—with an all-consuming kiss rife with danger and desire.
Simon Marlton, Viscount Adler doesn’t know which is more infuriating: that an anonymous intruder set his soul on fire and left a deep longing in her wake . . . or that during their encounter his signet ring, a token of his painful past, went missing. With the memory of a faint scent of paint spirits and the knowledge that his neighbor Emma is a portraitist, Simon sets out to capture his thief. He draws Emma into a flirtatious game, commissioning the talented lass to paint him—and enticing them both to reveal their whispered suspicions and deepest secrets.