Skylark — Jo Beverley

She'd risk everything to save her son.
Once she was Mrs. Hal Gardeyne, the darling Lady Skylark of London society, but now she's a terrified mother. Hal's death has made young Harry heir to her father-in-law's title and estates, and she fears Harry's uncle wants those prizes enough to commit murder. To safeguard her child, Laura has no choice but to turn to a man from her past....

He'd risk everything for a second chance.
Not a day has gone by without Stephen Ball thinking of the alluring girl who stole his heart and then married another. Now that she needs his help, he plans to protect her son -- and then seize the fiery passion that still burns between them.

As Laura and Stephen embark on their daring quest, they'll find themselves on a dangerous journey into their most secret and sensual desires....