It's good to see you admit that those may have been incriminating questions and that there may have been a breach of process, which explains why Kate McCann refused to answer their questions as an arguido.
If Encarnacao and Neves acted unlawfully the question remains why the McCanns never complained. Kate was made arguido because her answers might have incriminated her, not the questions.
I find the questions about the children most interesting. Why did the PJ suspect that she didn't cope well?
Asked whether or not it is true that the twins have difficulty sleeping, that they are restless and that that causes her uneasiness, she did not respond.
--- Asked whether or not it is true that at certain times she felt desperate [driven to despair; angered; exasperated] by the attitude of the children and that that left her much disquiet [unease], she did not respond.
--- Asked whether or not it is true that in England she was thinking to deliver MADELEINE into the custody [guardianship] of a family member, she did not respond.
http://www.mccannpjfiles.co.uk/PJ/KATE-MCCANN_07-09-07.htmNo-one, to my knowledge, has said Kate struggled with her children. The only reports on that subject came in September 2007;
Portuguese newspapers said she wrote in her diary about her difficulties with her children
https://www.pressreader.com/uk/daily-mail/20070914/281573761316053Either they were making things up or we didn't see everything the diary/diaries contained.