The Prince's Charmed Love - Stenwick Trilogy, #3

Lucy, the youngest of the three Stenwick siblings, is bored with the endless round of balls in the London Marriage Mart. She wants nothing more than to retire to the country with a husband to raise children. When she catches the eye of a second son of a king from a country she's never heard of, she looks for the blessing of her family before making any big decisions. Prince Daniel of Giselvakia has been sent out into the world by his father, told to only return when he comes home with a bride.
He doesn't look seriously until he spots Lady Lucy across a crowded ballroom. Unable to resist, he courts her with a single-minded purpose, to make her his princess and return home. When tragedy strikes Daniel's family, will Lucy and Daniel be able to work things out? Or will their marriage fall by the wayside?