Lord of Mischief by Sasha Cottman

Being the second son of a Viscount comes with the knowledge that no matter what he achieves; Freddie Rosemount won’t be the first member of his family to have done it.
With good looks, wealth and his father’s townhouse at his disposal, Freddie decides it is time to head to London and create a few firsts of his own.
Caught up in the endless whirl of elegant parties and political games, Freddie soon falls in with the wrong crowd. The Bachelor Board is a club for young men who wish to leave their mark on London society. Entry can only be secured by meeting a series of secret challenges, each more scandalous than the last.
Eve Saunders is a well-bred daughter of the House of Strathmore, but beneath her English skin beats a passionate French heart. The lust for danger runs in her family’s blood.
As Eve helps Freddie to secure his position on the Board, passion, and love ignite between them.
But the final, secret challenge for Freddie to secure his seat on the Bachelor Board comes with a shocking price.
When his furious father cuts off his money, Freddie’s life quickly spirals downward. He soon comes to see the terrible truth of what he has done to the girl he loves.
Determined to do whatever it takes to win Eve back, Freddie is dismayed to discover that Eve is not sitting at home crying over him.
When Eve begins to play her own series of sexy and dangerous games, Freddie is left with no other option but to take Eve on at her own game.
Only at the very last challenge, does Freddie see what he is risking and that Eve is playing for keeps.