My Lady Notorious
Heroine: Lady Chastity Ware.
Hero: Lord Cynric Malloren.
It opens in Nov 1761.
Orgy at Rood House: "Rood House was a handsome Jacobean construction, with leaded windows and steep gables." "The gracious oak hall with its wide staircase."
Host: Lord Heatherington.
Attending: Gresham, very large; Lt Toby Berrisford, red hair; Fort; Henry Vernham (the villain); Nerissa Trelyn.
Cousin: Mrs. Inchcliff.
Book 1 of the main Malloren World series.
Followed by: Tempting Fortune.
My Lady Notorious was first published in Mar 1993 by Avon .
It won the RITA for Best Historical Series Romance at the 1994 RWA conference.
It was reissued in Jul 2002 by Signet .
A UK edition "Lady Notorious" was published in 2009 by Everlyn  and is available from The Book Depository.
[All three covers are shown below]
More info on the book is available here: My Lady Notorious