A Season Of Flirtation (Least Likely to Wed, Book 1) by Julia Justiss
Her lessons in flirtation...
Might work too well!
When Lady Laura Pomeroy offers to give her friend lessons on surviving the Season, she doesn't expect her friend's brother to join in! Banker Miles Rochdale is dubious about the aristocracy, and clearly thinks Laura is shallow and silly. Frustratingly, mathematical genius Laura finds herself attracted to him, and knows she will enjoy challenging his assumptions! But as a marquess's daughter she knows there's no point impressing Miles. Because she'll never be allowed to marry trade...