It's disturbing at my age to look at a young woman's destructive behaviour and hear the echoes of it, of one's own destructiveness in youth.

We were in a great, seething moment in the 1970s. There was a new Labour government and everything seemed full of hope... But, as we got older and we saw how much women's behaviour contributed to what was wrong, we stopped being able to see ourselves purely as.

It's a terrific privilege to be able to see into somebody else's life.

I think some people wished I'd kept myself out of the book. But I kind of insist on it because I want the reader to share my engagement with the material, if you like, not pretend that I'm doing it completely intellectually.

Tentatively I stood a great lump of wood on the chopping block and bought the axe down on it. It flew into two perfect halves. Such was my elation that I ran inside, put on our ancient cracked record of Aretha Franklin singing Respect and danced all by myself for half an hour in our living room, without inhibition, almost crying with jubilation – not just about the wood, but because I could live competently some of the time, and because that day I liked myself.

People demand a lot of the justice system and they demand things that it can't deliver.

But I now think what I was doing, in a completely unconscious way, was getting off the turf where my husband and I might be rivals. We were both working in fiction... so I look back and I see that I consciously vacated the contested ground.