Cashel Byron's Profession by George Bernard Shaw

Next day Alice accepted Miss Carew's invitation. Lydia, who seemed to regard all conclusions as foregone when she had once signified her approval of them, took the acceptance as a matter of course. Alice thereupon thought fit to remind her that there were other persons to be considered. So she said, "I should not have hesitated yesterday but for my mother. It seems so heartless to leave her."

"You have a sister at home, have you not?"