Melanie Lynskey plays the adult version of Shauna. In the present day, Shauna is married to Jeff, and they have a daughter named Callie. However, Shauna is unhappy with her marriage. After mistakingly believing Jeff was having an affair, Shauna cheats on Jeff with a man named Adam, but when she begins to suspect that Adam is secretly blackmailing her and the rest of the Yellowjackets, she kills him. We later learn that Jeff was the real blackmailer, but Shauna tells her friends it was Adam, which leads the crew to help her dispose of his body. After Adam is reported to have gone missing, Shauna and Jeff continue to try and cover up his murder in season two by trashing his art studio, which includes evidence of Shauna and Adam’s affair. As the police close in, Shauna also makes her way to Lottie’s cult after learning that Natalie and Misty are there.