My take on Alex and Simon. Alex has been a SAHM since the birth of their first son. Because of his income and her small royalty checks, they are rather simple people that read the right mags to stay up on the name dropping game.
Now as their kids are reaching school age, they are being asked "Which school?" Realizing that they did NOT financially plan to spend 50K a year to send a 3 yr old to pre-school and since they do not have the income to "name drop" a school, Alex calls her agent.
The agents response is this show. SO they pack up the small house in the "burbs" And rent the "townhouse" that we see each week.
Alex is playing a part that her agent got for her! The drama queen that he is, hubby is enjoying his 15 minutes!
When the cameras are off they write and rehearse their own script.