Jaspierre Trilogy Series by Mixi J. Applebottom

Jaspierre had a man locked in her basement. He was careless, he deserved it. But she couldn't quite bring herself to kill him. She knew she was just making excuses. Mother would have done it that first night. But that first night had passed and many many years followed it. It was harder to kill someone when they were so attractive. Maybe if she would let him out for a bit, he'd do something awful. Then she could find her courage and slit his throat. After all, he deserved it.