The Light of Scarthey by Egerton Castle

Madeleine had appeared greatly distressed at the thought that, through her, her sister was now in so doubtful and precarious a situation. It was part of her punishment, she told herself for her sins of deceit and unmaidenliness in encouraging and meeting a clandestine lover.

She had gone through some very bitter hours since her tryst at the ruins. The process of cutting off a malignant growth that has become part of oneself is none the less painful because the conviction is clear that it is for one's health to do so, and the will is firm not to falter. Not the less is the flesh mangled, do nerves throb, and veins bleed. But Madeleine was determined that nobody should even guess her sufferings.