Don’t push your luck.别得寸进尺。

push one's luck  得寸进尺；在有利形势下再冒险，意图获得更多

I've had some good winnings, but I don't think I should push my luck any further. 我已经赢了一些钱了，但是我觉得我应该见好就收。

Don’t push it.

--Mom, can I have my phone back? 妈，我能拿回我的手机吗？

--No, I already let you watch TV for an hour a day, so don’t push it.

不能，我已经允许你一天看一个小时的电视了，所以别得寸进尺啊。