The heroine, the daughter of a duke, is raped, and her best friend, who is bisexual, marries her to 'save' her reputation. But they have agreed to be totally honest with each other, & she finds that she is interested in his lover too. So this book is about the ins and outs of their relationships, with several other sub-stories also. The author gets a little 'talky' when explaining these relationships (methinks she tries too hard), but the sex is down & dirty & pulls no punches. If you can't handle man on man sex or menage a trois, then don't read this book.