agree,, no need to let her know that you know her lies...that means you're telling her you 睇佢私隠?
some maids even won't tell you that they have relatives in HK...
正常, 雖然唔鼓勵...
if she breaks your things...steal...then no way..
just like kids, they don't want to report, because they are scare..
then better tell them first : to be honest if there is anything loss, damage..
tell them you want people to be honese and responsible.
when she tells you about the damage, praise them and waive sometimes...then they know what to do.