I had funny feeling which I am going to share. dont know I am right or wrong. but if it turns out to be right, dont blame me for spoiler. I think all that happening in that house is a master plan of some one. thats why the person sent Kira to corrupt the family members. who could that be? I think its Max’s father. thats why he gave that luxurious house to them. remember the pre setup hidden cams and the nude paintings on the wall? whats the reason behind them? why he is did so... because he needs money badly and making porno is the easiest way to make huge money in short time. Or he is really a perverted person. you are share your views..........
I been thinking that maybe the dad will come but there is a few issue with your post.
1. There was only 1 cam not even hooked up in the lounge, no where else. If wanted to spy then why in the lounge and not the master bedroom?
2. It sounded like the dad was in trouble and selling off a lot of assets to down size or something or to retire.
3. As said in the beginning of the game it was design as a bachelors pad and is why there are naked "women" paintings on the wall. There are 4 women here and if it was to make them horny to do porn movies then the painting would have been of men.
But with all this we will not know until the game is finish or he shows up in an update.