I talked with my friends and found out that really a lot maid would do this, the difference is the employer knows or not.
Actually, my daughtor goes to primary school, and my maid is the only one staying at home most of the time. The Cam is used to check if she really bring someone (or to remind her not to bring her friend back) to my house
exactly. the first time i found those pictures I was shocked. However, if you really try to find it out, I am dare to say at least 50% of the maid they do take such pictures.