The Waiting — Mary Napier

Alone in a vacation cottage, she's a prisoner. Abused and sexually threatened by her own son's gang. But what is it they really want? Why do they have wealthy industrialist Paul Moynihan bound and tortured in a locked bedroom?

The hours pass. The terror becomes days. Soon she will have no more time. To save herself. Or her son. Or Paul Moynahan, a man who makes her passionately desperate to live.