Guest host Molly Ringwald sits in for Kurt Andersen this week. She interviews author Lauren Groff, whose novel “Fates and Furies” tells the story of a marriage twice — once from each spouse’s perspective. And boy, their versions do diverge. Then, we hear a live performance from the cabaret legends Kiki and Herb, the characters brought to life by Justin Vivian Bond and Kenny Mellman. They’ve been on hiatus for almost a decade, but they haven’t mellowed a bit.