Swear by Moonlight — Shirlee Busbee

London's loveliest and wealthiest social pariah, Thea Garrett guards her wounded heart by refusing to give love a second thought. Then she encounters the cynical and handsome Patrick Blackburne, who's protecting wounds of his own.

The moment Blackburne lays eyes on the remarkable Miss Garrett, he instantly forswears his famously wicked ways.
But when a gossamer web of dangerous blackmail spins around them, Thea and Blackburne must face the truth: neither can swear by love.

THE RELUCTANT BRIDES, in series order
A Heart for the Taking
Swear by Moonlight
While Passion Sleeps

THE SOUTHERN WOMEN, in series order
The Tiger Lily
Each Time We Love
At Long Last
Love a Dark Rider

THE LOUISIANA LADIES, in series order
Deceive Not My Heart
Midnight Masquerade
Love Be Mine