If she gets short notice about working overtime, she'll pick up the phone and--half in guilt, half in apology--say repeatedly, "I'm terribly sorry about the inconvenience but could you care for them a little bit later tonight.
萬一臨時得加班，只好拿起電話，又是抱歉，又是愧疚地向保母頻頻說：「對不起，今天可否麻煩帶晚些… …」。