Honoria Smythe-Smith is:

A) a really bad violinist
B) still miffed at being nicknamed "Bug" as a child
C) not in love with her older brother's best friend
D) all of the above

Marcus Holroyd is:

A) the Earl of Chatteris
B) regrettably prone to sprained ankles
C) not in love with his best friend's younger sister
D) all of the above

Together they:

A) eat quite a bit of chocolate cake
B) survive a deadly fever and the world's worst musical performance
C) fall quite desperately in love

It's Julia Quinn at her best, so you know the answer is...

D) all of the above