https://screenrant.com/tbbt-penny-leonard-young-sheldon-georgie-mandy-story/

Penny and Leonard's narrative on The Big Bang Theory already spoiled what will happen next with Georgie and Mandy's story on Young Sheldon.

George Jr was a businessman and opened a chain of tire stores in Texas called Dr. Tire. This was in Big Bang Theory and Georgie was played by Jerry O'Connell. So George Jr. made it fine and is actually the wealthiest of the three children and a millionaire.

Mandy? Do you mean Missy by chance (unless I am wrong). There isnt too much background on Missy except she was deeply effected by the loss of her father, by what Georgie stated to Sheldon. Missy was married once and divorced and pregnant by another man in the later season of Big Bang. Nothing in the later series have stated what career she had if she had one.

Sorry, Ok, Mandy the mother of George Jr's child? She wasnt mentioned on the Big Bang Theory.....