「お礼に一杯おごろう。実は今日、給料が入ったんだ」
「そうですね、嬉しいお誘いなのですが……」
「……娘が心配しちゃいますので」
Context: The above two characters have been out for a while and the guy offers to treat her with his pay. She declines because:
1) Her daughter will be worried about her 2) She is worried about her daughter
I believe its 1) as I think 心配なので would have been used for the other meaning but I am unsure.