A Pocket Full of Mischief by Alyssa Clarke

Miss Penny Fairbanks had always stood out with her vibrant spirit and penchant for mischief. However, to support her infamous family’s attempts to find their place among the ton, she reluctantly agrees to adopt a more subdued demeanor, practicing decorum and modesty. Until a haughty viscount callously insults her sisters, igniting Penny’s ire and determination to see him humbled.

Her new goal: bringing down the arrogant viscount!
Little does she know, her path is about to cross with the Duke of Shrewsbury, a man whose stunning good looks and irresistible charm are matched only by his reputation. When he unexpectedly decides to intervene in her quest for vengeance, Penny becomes locked in a captivating battle of wits with the duke, filled with thrilling, sensual encounters.