Office hours plus commute means they are not home much.
Fortunately very many of their friends have ended up living and working nearby in London.
So weekends are particularly unpredictable. I have joked about installing an enormous cat flap.
On the bright side, I have developed a new cuisine - Weekend Stew.
I got out my cavernous witch's cauldron from its semi-retirement at the back of the cupboard and I stew up beans, onions and root vegetables and frankly anything else in the fridge that appears to be on its last legs. I make it delicious with olives and capers, or garam masala, or smoked paprika, and serve with a hillock of brown rice.
Weekend stew divides up between any number of diners. It can be heated up at 3am when one returns from a party. It can be stretched to accommodate guests.
Only problem is I'm tiring of it. Yesterday I'm sure I caught the black-eyed beans staring at me reproachfully as I surreptitiously heated up a pizza.
However in a few weeks the twins plan to be gone - off to rented bliss - and our weekends will become predictable once more.
So for the moment, Weekend Stew it is!