https://www.cbr.com/young-sheldon-george-brenda-affair-explained-cbs/

Fans of CBS' Young Sheldon have been waiting for George's affair with Brenda, and The Big Bang Theory spinoff shows the reason why it happens.

Young Sheldon Season 7 Surprisingly Sets Up George's Cheating Scandal, Makes 1 Theory More Likely (https://screenrant.com/young-sheldon-season-7-george-cheating-mary-setup-theory/)

Young Sheldon season 7 unexpectedly revives Sheldon's George's cheating scandal story, but the incident may not have happened exactly like he claimed.