Jessie Stephens is a 29-year-old writer and podcaster currently employed by Mamamia as Assistant Head of Content.Jessie Stephens is a 29-year-old writer and podcaster currently employed by Mamamia as Assistant Head of Content. If Sally Rooney wrote nonfiction you'd have Heartsick - three interwoven stories of the ways love can bruise, break and build us, from a much-loved Mamamia writer and an exciting new nonfiction voice.