Another recurring theme on In Your Dreams is the idea of love as fleeting. "Certainly it is for me, in my life as a travelling woman who is never anywhere for long, and will be gone the morning after the big show. There's a line on In Your Dreams that goes 'I'm always in and out of your light', and to lovers, ex-lovers, people we used to love, people we don't even love any more, I'm saying 'You'll never be rid of me, I'm right down the middle of all your dreams'."
Without any prompting, Nicks brings up Buckingham, whom she met as 16-year-old at school in California and stayed with for 11 years.
"It's like Lindsey and me: no matter how many children or grandchildren you have, Lindsey, I'm always gonna be there. Lindsey has these three marvellous children, and that has given him unconditional love, which is what he always wanted. I couldn't give him that. But I know a lot of Lindsey's songs are about me, because a lot of my songs are about him. I call us 'our Miserable Muses'. In a band like Fleetwood Mac, you have arguments, and it makes for great art."
She's warming to her theme, the slightest smile playing about her lips. "So is he sorry that our relationship broke up in 1976? Yes. And if he had to do it all over, would he not move to LA, and maybe try to find our record deal in San Francisco? Yes. Because we both believe that we might still be together. Probably not, but it's possible .... When we're together, and people see the two of us walking towards them, we are a force of nature. Absolutely."
We return to the defining relationship of Stevie's life. During every Fleetwood Mac concert, there's a poignant moment when she and Lindsey Buckingham slow-dance around the stage. Does she have any idea what that does to their fans?
"It kills them! It's the fairytale happening. Of course they love seeing that connection. It's Beauty and the Beast. And who is the beauty and who is the beast? Am I the beast, and Lindsey the beauty? It's quite possible."
Two beauties, perhaps?
"Two beasts," she replies under her breath.