My wife encouraged me to buy the 21 maratime skiff I have now, so she would have a place to pee in private. The photo below is of the 23 but the 20p looks the same just smaller.
The extra wide console door open into a hidden cabin
I did buy her a porta poti but she discovered its easier to hang off the side rail of the center console and just go overboard when no ones around.
A few years ago I knew a guy that had an 18 foot aquasport with cabin if your looking for a used boat they are probably still around for sale.