Never thought you need a permission to record other people at your own home, but it does make some sense.

Well, the issue is that it was his spouse's home too, and she has the same reasonable expectation of privacy within her own home as well.

The problem is that he recorded her without her consent, in an area where she would have an expectation of privacy.

They both got hit for their actions. He was awarded NT$500,000 in the divorce, and would be fined NT$150,000 for his part in the illegal recording. He'd still come out about $11,000USD ahead if he just paid the fine lol.