Faro's Daughter by Georgette Heyer - and - Venetia by Georgette Heyer

I'm on a bit of a Georgette Heyer reading kick.  There's simply no author who writes Regencies better.  When I need to immerse myself in the language and mores of that time period, I turn to Heyer, and thoroughly enjoy myself.
 

Beautiful Deborah Grantham, mistress of her aunt's elegant gaming house, must find a way to restore herself and her aunt to respectability, preferably without accepting either of two repugnant offers. One is from an older, very rich and rather corpulent lord whose reputation for licentious behavior disgusts her; the other from the young, puppyish scion of a noble family whose relatives are convinced she is a fortune hunter.

Max Ravenscar, uncle to her young suitor, comes to buy her off, an insult so scathing that it leads to a volley of passionate reprisals, escalating between them to a level of flair and fury that can only have one conclusion... 

A young lady of beauty and intelligence facing an unbearable choice...

Venetia Lanyon is one of Georgette Heyer's most memorable heroines. Beautiful, capable, and independent minded, her life on the family's estate in the countryside is somewhat circumscribed. Then a chance encounter with her rakish neighbor opens up a whole new world for Venetia. Lord Damerel has built his life on his dangerous reputation, and when he meets Venetia, he has nothing to offer and everything to regret. As Venetia's well-meaning family steps in to protect her from potential ruin, Venetia must find the wherewithal to take charge of her own destiny, or lose her one chance at happiness...