They had more conversations, including an unexpected heart-to-heart, after moving back in together. Georgie fretted about supporting Mandy and Baby Cece, while Missy felt exhausted from running the household.
After a year of disobedience, Missy briefly appeared to be committed to behave in the Young Sheldon season 6 finale. In The Big Bang Theory, Georgie branded her a "dumb teenager"—this contradicted that.
When Missy makes bad mistakes again, young Sheldon proves the Coopers' oldest child was right. Georgie struggled following George's death since he cared for Mary and Missy.
A new romance for Missy may seem innocent. Her choice will be regretted after knowing what's coming for the Coopers. She lied openly to her parents, but George's death in Young Sheldon season 7 may change things.