It's a little like being asked what it's like having a pair of lungs. I don't know - Good? Useful? Essential? Being a twin makes up my DNA: my twin-ness sits snugly inside each and every cell that makes up my body. It's why we have the same colour eyes; the same colour hair and tiny wrists. It's why I am me and she is, well, she.
As she runs off to play, I contemplate the wondrous capacity of the human spirit to overcome adversity. Just a few weeks ago this same child did not know me, and had never set foot in our home. All this is new and alien. She has been removed from everything she has ever known to become a looked-after child in foster care, with no sense of how long this might last.
I count my blessings. This week I had the privilege of attending the Mind Media Awards and Fostering Excellence Awards in London on successive evenings. Both events are born out of human frailty but celebrate the extraordinary kindness and resilience of ordinary people in the face of often appalling circumstances.
One day children who have been in our care will ask questions about their past that simply cannot be answered in a memory book. Above all, we hope that they understand that they were loved and cherished. And we hope that they know that they can come to us for those elusive answers. We are, after all, merely custodians of their memories.
Foster care would be that little bit easier if you could press a 'pause' button on your own life. What would we not give for some sort of arrangement to put everything on hold, as we work to resolve the seemingly intractable problems of the children who come into our care? But the reality is that our own lives carry on: stuff happens to us too, with no regard for the children and young people who have been entrusted to us.
Objections since the 1970s to Global Women's Strike's demand for wages for care have consistently let women down - we are no better off, our families are no better off, and many are now shackled in employment against our wishes, suffering double and triple shifts and facing intolerable pressure, pushed out of our homes by increasing bias towards commercialised care.
Those inclined to judge might say it's irresponsible to spend money on anything other than the basic necessities when you're struggling financially, but where do you draw the line? Do you decide to wait until you're earning more or have paid off more of your debts before you get the kids a pet or take them on holiday, or do you realise that if you wait for those things to happen they'll have grown up and gone?
The stuff that memories are made of: Arriving at Delhi Airport and making our way to the railway station was like being launched into a real-life version of Mario Karts - our taxi lurched through the city amid a maelstrom of fumes and horn blasts, black and yellow tuk-tuks swarming around us like angry bees.