Found this, unregistered, at my OBCZ. (Cover is different.)

From the cover -
Simon Frederick Cynster knows that a perfect bride - and a perfect lover - are one and the same. So he sets about finding a mate to suit his needs - someone who will be a perfect lady by day... and a wanton lover by night.

But Simon is not about to broadcast his search in the entire ton and run the risk of every dowager foisting her flighty charges upon him. Instead, he carefully begins his search at a house party at Glossup Hall... and is astonished when willfully independent Portia Ashford immediately captures his interest.

He's known her since childhood and certainly never considered her a potential wife... until an unexpectedly heated kiss changes his mind forever. But as he and Portia begin to explore the depths of their passion, a shocking event occurs... one that puts Portia in deadly peril, and that will require Simon to use his considerable strength and influence to protect his once and always perfect lover.

RELEASE NOTES:

Left on the OBCZ shelf in the back room.