A Proper Guardian (Heartsong Presents)

is book #1057 of the Heartsong Presents line.
==Book Description==
Lady Winter Renton will marry only for love 
As the sole heir of her family's country estate, Lady Winter is plagued by greedy aristocrats looking for a marriage of convenience. Perfectly capable of running the estate after her father's death, she is infuriated by their scandalous proposals. She wants more than a heartless merging of property and bloodlines. Until she meets true love, Winter vows to carry on alone. 
Winter's appointed guardian, the dashing Earl of Alistair, is intrigued by his lovely young ward, and whisks her to London for a season of elegant balls and lavish soirees. As his admiration for her turns to love, Lord Alistair finds himself ensnared in rumors of political conspiracy and social scandal. Can Lady Winter trust in Lord Alistair's love, and have faith that God has a plan for the two of them—together?
(Description from harlequin.com)