Zack was driving and Beatrice sat at the back at the twins' insistence.
"You are our beloved, so how could we let you sit in front?" Zack said.
The unwritten rule about this in Country Tz was rather strange to some people.
If you are friends, or colleagues, then there must be someone sitting next to the one driving as he/she is not your driver.
If you are taking a superior, then only those of the same 'rank' would sit behind with the superior. If there are none, then it is to remain empty. Thus, even if you are in a high position in the company, you are still 'lower' than your superior and is the 'driver'.
If you are with your special person, then naturally, the seat next to the driver is hers (or his) as you are 'equal' partners. The one sitting at the back would be the 'unimportant' person.
However, there is one exception to this.
When they want to serve their beloved like a Queen - which was what the twins were doing.