The old man's son and daughter in law thought he was a nuisance.

老人的儿子和儿媳觉得他是个累赘。

The old man's son and daughter in law looked at one another and without saying a word started weeping.

儿子和儿媳相互看了看什么也没有说就哭了起来。

The old man would have sad look on his face as he looked at his son and daughter in law's dinner table.

老人看着儿子和儿媳在餐桌用餐时，脸上的表情很悲伤。