She misinterpreted his silence.

As she understood it, he appreciated an act of self-sacrifice on Miss Westerfield's side--but he had no word of encouragement for an act of self-sacrifice on his wife's side.

She threw down the pen, with the first outbreak of anger that had escaped her yet.
"You have spoken for the governess," she said to him.

"I haven't heard yet, sir, what you have to say for yourself.

Is it you who tempted her?
You know how gratefully she feels toward you--have you perverted her gratitude, and led her blindfold to love?
Cruel, cruel, cruel! Defend yourself if you can." He made no reply.
"Is it not worth your while to defend yourself ?" she burst out, passionately.