A Tangled Web by Judith Michael

Glamorous, divorced Sabrina and her quiet homemaker sister Stephanie never dreamed that their light-hearted game of switching places for a week would end in passion and tragedy. But Sabrina fell in love with her sister’s husband, cherishing their children as her own — and Stephanie, in the midst of an affair with a powerful London socialite, was killed in an explosion on his yacht. Torn by loss and remorse, but deeply a part of her new family, Sabrina made the decision to assume her twin’s role forever.