She must prevent the affair going further.

She must break off the intimacy.

She must save those two young people from making a mistake which would--She wrung her hands as she thought of it.

Of her own sorrow and trouble she characteristically thought nothing now.

Sacrifice of self was a part of Keziah's nature.
The pines were a deep-green blotch against the cloudy sky and the gloomy waters of the bay.