Evil at Roger's Cross — Catherine Marchant

Prudence Dudley sought solitude in which to recover from the ache of a lover's betrayal. She found an oddly isolated old house in which bitter secrets lurked and sinister tensions lay buried just beneath the surface.
She tried to avoid becoming involved, but she was drawn deeper and deeper into the whirlpool of emotion. And finally she had to make a choice between two fiercely proud brothers, and discover what was hidden behind the iron facade.