There is a site called Fantastic Fiction that does a wonderful job of not only listing the books by each author they list, but doing it in publication order.

Georgette Heyer had a book called A Civil Contract that I was very young when I read. And I remember realizing that there was a lot she wasn't going to describe, like sex lives of her more innocent characters. In that one it was a marriage of convenience, but (if I've found the correct title) it meant everything that goes with a marriage was included, sex and children as part of it. I think it was with this book that I realized one had to read between the lines or look closely at references to know what was going on.

On an unrelated note, if you're interested in a modern story intended to be a rendering of many of the novels of the period of Jane Eyre and those more recently created by Heyer, the film Firelight is constructed around all of those manners yet behind-the-scene machinations. William Nicholson is a writer who researched the period and wrote the screenplay that he hoped would receive a much better response. Unfortunately the only reviews that appeared online were from over-wrought religious groups who found partial nudity and sex to be offensive in a film. It hits all of the bases that the older novels did, and really should have become a modern classic. (PM me and I'll share my file - you can only get the "cropped for your TV" version via Netflix and it loses a lot when the crop the wide format.)