Holly, Michael, Dashiell and Claudia read the book which their liberal parents Paul and Roz Mellow have written, a book that features illustrations of their parents' lovemaking. 30 years later, when the book may be reissued, we catch up with their complicated 21st-century lives and those of the icon...

Holly, Michael, Dashiell and Claudia read the book which their liberal parents Paul and Roz Mellow have written, a book that features illustrations of their parents' lovemaking. 30 years later, when the book may be reissued, we catch up with their complicated 21st-century lives and those of the iconic couple whose marriage has not run smoothly.