Young Sheldon season 5 and 6 hint at the moment when George Cooper Sr. cheats on his wife, Mary. It is implied that his relationship with neighbor Brenda Sparks leads him to his infidelity. George's unhappiness with his life is shown as a justification for being unfaithful to his family. While George's affair is not shown on-screen, it has been alluded to through hints and allusions in the show. The impact of his affair is causing him to spiral more into the character described in The Big Bang Theory. Season 7 is expected to bring the affair to light, finally proving that George did cheat on Mary.