I'm sorry to hear you've had a contretemps with your sister.

我很遗憾听说你和妹妹发生。

The son, who took every little contretemps as if it were a tragedy, was listening also.

把一个小意外都当成悲子也在听。

Well, our little contretemps at your party.

那天晚会上我们小小不愉快。