Could she go through with it?
She must.

She would never, never go back.
As usual the substantive sister--Prudence--did all the talking for the pair; Angelina, the shadow, offered only her submitting nods.
Sometimes she missed her cue and nodded affirmatively when the gesture should have been the reverse; and Prudence would send her a sharp glance of disapproval.

Angelina's distress over these mischances was pathetic.
None of this by-play escaped Ruth, whose sense of humour needed no developing.

That she possessed any sense of humour was in itself one of those human miracles which metaphysicians are always pothering over without arriving anywhere; for her previous environment had been particularly humourless.

But if she smiled at all it was with her eyes.