a sore point 痛点；伤心事

【例句】
It's a sore point with Sue's parents that the children have not been baptized yet.
孩子们至今未受洗礼，这是休的父母的一件伤心事。

It's a sore point with Sue's parents that the children have not been baptized yet. 　　
让苏的父母很伤心的是孩子们至今还没受洗礼。