The episode also acknowledged that Missy is now 13 years old — which, according to Big Bang, is the age where Sheldon walks in on his father having sex with another woman.
Out of all the bad things Sheldon and Mary said on Tbbt about George, Sheldon's confession about catching his father having sex with a different woman was arguably the worst.
In "Hot Tub Contamination," the socially-inept genius confessed to Penny that the reason he started knocking thrice was because he once walked in on his dad cheating on his mom. Not confronting George about it...
However, it seems like the breakdown of Mary and George's marriage is finally happening as the couple got into a massive confrontation upon learning that they may have been unfaithful to each other.
In The Big Bang Theory season 10 episode "The Hot Tub Contamination," Sheldon told the story about catching his dad having sexual relations with another woman when he was 13. It was the reason why Sheldon started knocking three times.
Spoilers ahead for Young Sheldon season 6, episode 14. Young Sheldon willingly ruins Mary in order to justify George's cheating ways with Brenda as in season 6 the long-simmering marital issue between the Cooper parents finally reaches its boiling point.
During Thursday's episode, Sheldon's twin sister Missy confronted George about sneaking around with next-door neighbor Brenda Sparks. The episode also acknowledged that Missy is now 13 years old — which, according to Big Bang, is the age where Sheldon walks in on his father having sex with another woman.
Do Sheldon's parents get divorced? They clearly do, but Young Sheldon is not making it easy for people to disapprove of George. The revelation on TBBT came while he explained to Penny (Kaley Cuoco) how he barged into his parents' room and saw his dad cheating with another woman.
"A Stolen Truck and Going on the Lam" showed George and Mary finding her, and in the process, the series explained why they never got a divorce.
In Young Sheldon, it is revealed that George Cooper Sr. was sacked from an earlier, possibly more well-paying job after having reported his colleagues.
Fans of the franchise will know that Lance Barber, the actor who plays Sheldon's dad on "Young Sheldon," also appeared on "The Big Bang Theory" during season five. Back then, he wasn't playing Sheldon's dad in a flashback, but an entirely different character: Leonard's high-school bully.
In Season 7, Episode 9 of The Big Bang Theory titled "The Thanksgiving Decoupling," Sheldon has a moment with Bernie's dad where they bond over football. Sheldon mentions that he watched football a lot with his dad. A bit later, Sheldon confides that his dad passed away when he was 14.
In the Young Sheldon episode "German Folk Song and An Actual Adult," things reach a boiling point between Mary and Brenda, and the former quits her bowling alley job and storms out, with Brenda following her. Mary accuses Brenda of cheating with George, but Brenda tells her side of the story.
He suggests couple's counseling and Amy agrees. However, George emotionally cheats on Amy with her assistant Mia. He often looks at her online pictures. George supports Amy as the breadwinner of the family, helping to hold down the household while she does business.
Because of The Big Bang Theory, fans of the series know that Sheldon's dad dies when he is 14, about a year after Sheldon discovers his father having an affair.
While Georgie and the mother of his first child, Mandy, are no longer together in the show, it was never explained what happened between them, even though Mandy majorly impacts The Big Bang Theory.
She finally reappeared in the season 11 finale, at Sheldon and Amy's Wedding. This was her only physical appearance of her and her actress Courtney Henggeler in a decade. In the episode "The Cooper Extraction", it's revealed that Missy got married and was having a baby.
Why Young Sheldon's George Cheats On Mary. George's Young Sheldon Brenda affair was set up in the season 4 finale after he and Mary had a massive fight. The fight led him to Brenda, and the two was interrupted from their almost-tryst by his health scare.
Plus, EP Explains Georgie and Mandy's Daughter's Name - IMDb. Georgie Cooper is officially a dad! During Thursday's Young Sheldon, Mandy gave birth to their daughter — a precious “niblingo” by the name of Constance.
Does Georgie marry Mandy? It is almost assured that they did get married thanks to Big Bang Theory showing that Georgie and two of his ex-wives sent him congratulatory text messages. Thanks to what happened in Young Sheldon season 6, it is almost certain that they did get married, even if they ended up divorced.
In The Big Bang Theory, Mary and Alfred were initially going to share a cab home, but decided to have a nightcap leading to them spending the night together.
Eighteen years after an unwed Mary became pregnant with Georgie, George and Mary's first born knocked up older girlfriend Mandy — and Thursday's episode of the Big Bang Theory spinoff picked up in the immediate aftermath of that bombshell.
25-year-old Mary Tucker and 31-year-old George Cooper go to a bar, get drunk, and sleep together. Mary gets pregnant from that night. Mary and George have a shotgun wedding one month after discovering Mary's pregnancy. March 1975: George Cooper Jr. is born.
For Young Sheldon's big brother Georgie, life will never be the same again. The Big Bang Theory prequel's 100th episode revealed that the 17-year-old high school dropout, who had been lying about his age, knocked up 30-year-old girlfriend Mandy (played by recurring guest star Emily Osment).