Sown in the Wind — Jean S. MacLeod

Judith's life had just been disrupted by the death of her mother, so when Stephen Long asked her if she would go to his Scottish home to look after the two children for whom he was responsible, she accepted gladly.

She did not realize how much she would come to love the children, and how their happiness and hers was to be threatened by Stephen's ambitious sister and his beautiful, calculating fiancee.