Twelve Days by Teresa Hill
Twelve Days before Christmas, Rachel McRae opens her front door and a social worker puts a baby in her arms—one who comes with a four-year-old boy and an eleven-year-old girl—siblings abandoned and in need of a temporary home.
But there's a catch: Rachel's family is falling apart.
Rachel and her husband, Sam, have dreamed of a house filled with children—a dream that has led them to repeated heartbreak. Sam McRae has finally decided the only thing left to do is leave his wife.
Reluctantly, Rachel and Sam take the children in, but just until after Christmas. They will do their best not to fall in love with them, not to get their hopes up that this time a miracle will happen. That these children will stay, and that their marriage can still be saved.