Danny Lavery welcomes Kristina Gaddy, the author of Well of Souls: Uncovering the Banjo’s Hidden History and Flowers in the Gutter: The True Story of the Edelweiss Pirates, Teenagers Who Resisted the Nazis.  Lavery and Gaddy offer advice to a bride who’s adoptive mom is upset that her biological mom was invited to her wedding. Another letter writer is wondering how to talk to his fiancėe about the unscientific nature of social media. Plus, banjo origin stories with a cameo from Slate’s own Ben Richmond! Need advice? Send Danny a question here. Email: [email protected] If you enjoy this show, please consider signing up for Slate Plus. Slate Plus members get an ad-free experience across the network and exclusive content on many shows—you’ll also be supporting the work we do here on Big Mood, Little Mood. Sign up now at Slate.com/MoodPlus to help support our work Production by Phil Surkis Learn more about your ad choices. Visit megaphone.fm/adchoices