A Waltz in the Park (Half Moon House #1.8)
Deb Marlowe

Propriety is Miss Adelaide Stockton's most important asset. She must be all that is prim and proper if she's to live down her parent's misdeeds and have any hope of catching a husband. She must avoid scoundrels like Vickers at all costs. Yet fate has thrown them together--and given each a key to the other's ambition. A bargain is struck...but together they find that gaining what one desires most is far more difficult than a waltz in the park.