I have not until now looked at the Forum. I seem to be able to interpret all the instructions, but I have a couple of issues.
The first concerns the third instruction (She drew again ...). The result is not a straight line since it has two kinks in it at points where you duck under the table. I can't see a way of avoiding this if you have to include 36 cells. However, the Listener has often taken a cavalier approach as to what constitutes a line. I think what we have here is three line segments.
The second concerns the new words created by the paintbrush exercise. I get nine new (unclued) words, two of which are backwards. I think I can find seven definitions if I look in the right place - which might be an interpretation of the wife's last comment. However, it does not quite hang together as neatly as it might.