Countess of Stars by Kimberly Cates

A reckless vow…
After her beloved mother’s death, Lady Grace Elliot makes a promise to her heartbroken little brothers never to leave them. She has no idea what that vow will cost her. Warm, brave and compassionate, Grace must take desperate measures to keep that pledge. Her one hope to remain close to her heartbroken little brothers: marriage to London’s most notorious bachelor, a nobleman with a heart encased in ice… The ruthless Viscount Everdene.

An Elusive Viscount…
All of London delights in scandal sheet accounts of ton beauties and their mamas’ schemes to trap Lucien Harcourt, Viscount Everdene, into marriage. But Lucien has no intention of continuing the grim family legacy that scarred his own childhood. When Lady Grace comes to him with an unthinkable plan, he believes he has no heart to risk. But as Grace champions the poverty-stricken children working in factories, her irresistible warmth and kindness open Lucien’s eyes to a world he’s never seen and challenges everything he believes about himself.