Part 10 is "off", in that it is different. Some of the consequences of being a maid so long term are finally coming up and having to be faced. So in a sense the story is taking this from the "playful fantasy" place into the "living fantasy with side effects" place.
This does change the mood, and I am not quite sure how I feel about it either, but it partly depends on if the story continues, which I hope it will, and where it goes from here.
Just taking things at face value, suddenly Jackie is going to pass for a maid, so successfully and fully, that when Bruce returns from his work trip, he can happily assume and treat her like a sex-bot as much as a maid-bot, all without realising or being aware that she is a living person, not just a fancy robot.
The growing wicked, teasing and dominant streak in his wife is a lot of fun to see, and it does add to the general feeling of a couple who have been growing apart for quite some time now, even if they do have a shared and common interest in their maid sex toy