English Ivy (English Ivy #1) by Catherine Palmer

On the eve of her 21st birthday, Ivy Bowden has much to anticipate. Engaged to be married to the man her father has chosen for her, Ivy dreams of a secure, contented future. But when she finds herself in the arms of her roguish neighbor, her world is thrown into complete disarray. Ivy must choose to submit to her family's choice, follow the leading of her willful heart--or obey her Father's will.