From Amazon review:"While visiting a famous London museum, Frances Hart accidentally wanders into a meeting of the Men and Women's Club, which gathers at the museum to discuss sex. Intrigued by Frances' forthright answers when she is questioned on the subject of a woman's right to pleasure, barrister James Whitcox insists that Frances join the club. What begins as a philosophical discussion soon becomes a hands-on study of desire when James convinces Frances to indulge in a scandalous liaison. But neither one expected their temporary affair would ever turn into love. Schone is known for her boldly sensual writing, and Scandalous Lovers is no exception. The sizzling affair between Frances, a refreshingly older heroine, and James is captured in vivid detail, but Schone also gives readers some surprisingly nuanced characterization and an expertly evoked Victorian setting."

It has been a number of years since I've read a book by Robin Schone, and although I remember greatly appreciating The Lady's Tutor, I think there were a few which I was less enthusiastic about. Initially here too I found it slow going and somehow almost stilted.
Gradually, however, I came to appreciate the story and especially Frances Hart more and more. As a romantic hero James didn't quite do it for me, even though I very much applaud the choice of an older couple.

Possible spoiler follows:
For me the middle and especially the last part of the book concerning the trial and the conflict with Frances' son won me over completely. So much that we have taken for granted was fought for bitterly, as here. I started to put that sentence in the simple past, but realized that much of what we have fought for is currently being lost in many countries, like the USA.
I found the last part of the book hard to put down. An intriguing read.