The Velvet Trap — Jane Blackmore

She hadn't recognized the voice on the phone, but the ugly threat was unmistakeable: Mandy was not to go home to Gable Lodge. But her foster mother was dying, and Nicholas would be there--the boy she had grown up with, the young man she had loved...and lost. -- Everything at Gable Lodge seemed changed. The familiar servants had been discharged, and the house was run by Lew Williams, a strange young man whom she did now know, who had the complete trust of Aunt Emma--a woman who never trusted anyone.

With mounting horror, Mandy soon realized that her life was in danger, and that it was magnetic Lew Williams who knew the reason why.

Did Nicholas still love her--enough to risk his life for her?

Also published as A Trap For Lovers