Around halfway through this. The MC, despite her excellence, beauty, and perfect virtue, is under the power of her profligate libertine of a husband. Her attempts at turning him around via tolerance and sweetness have been completely ineffectual.

This doesn't have the underlying wit of Frances Burney or Jane Austen that makes people see their books as serious literature, but it's pretty competently written, I like it.

In my reading games this is Classics (sub-category 1: mid-18th c).