When the cat's away, the mice will play means people sometimes misbehave when there is no supervision.

VOA: special.2009.09.27

There's no adult supervision and you kind of run everything.

没有大人的监督，你可以做任何事情。

很好奇住宿生活 - SpeakingMax英语口语达人

Torgl's plant makes the Jeep Grand Cherokee, under the supervision of plant manager Pat Walsh.

VOA: standard.2010.07.29