The Summer I Turned Pretty teased the letters Susannah wrote to Belly and Conrad for their respective wedding days - but what did the messages say for those of Us who can't read cursive? During the Wednesday, August 27, episode of the hit Prime Video series, Belly (Lola Tung) was about to get married to Jeremiah (Gavin Casalegno) before Conrad (Chris Briney) revealed he still had feelings for her. At the center of the drama was Conrad and Jeremiah's later mother, Susannah (Rachel Blanchard), who wrote letters for her kids and Belly before she died.