Warning! Spoilers ahead for Georgie & Mandy's First Marriage episode 10, "A House Divided."

Mary has gotten so vile that even Georgie & Mandy's First Marriage's Thanksgiving episode, which was unexpectedly emotional, the Cooper matriarch makes her return to the spinoff sequel to visit Baby Ceecee. However, what is supposed to be a fun visit ends up being an intense few days for Georgie and Mandy, as they find themselves caught between their feuding mothers. Mary is pissed that she has been left off of Baby Ceecee's first photo book, while Audrey gets defensive about it.

Those who followed Young Sheldon, particularly its final years, would know that Audrey and Mary have always had a contentious relationship. They once went behind their respective kids' backs and had their granddaughter baptized separately. When they were caught, Georgie and Mandy decided to take away their babysitting privileges. Unfortunately, the death of George drastically changed the future of the Coopers, with that ban eventually being forgotten. After maintaining their peace for a while, the in-laws are once again at odds, with Mary's worst side coming out.

Pastor Jeff Cannot Believe How Vicious Mary Has Become In Georgie & Mandy's First Marriage Episode 10

Mary Is Fuming Mad At Audrey

Throughout the entirety of Georgie & Mandy's First Marriage episode 10, Mary and Audrey are at odds. Even their respective children are forced to pick a side. Because of the severity of the feud, "A House Divided" even shows Mary in her workplace, which happens to also be in the church that Pastor Jeff leads. Multiple times in the outing, Mary finds herself being hysterical over Audrey's decision to exclude her in Baby Ceecee's photos. While she has every right to be mad, she goes overboard with her words — something that even Pastor Jeff points out.

While never a series regular, Pastor Jeff was a big part of the end of Young Sheldon.

Why Mary Has Become So Much Worse Since Young Sheldon Ended

Mary Has No Real System

Ultimately, Mary's downfall can be chalked up to George's death in Young Sheldon. While the Cooper matriarch has always tended to be over-emotional, she was usually grounded by having her family complete. Losing George unexpectedly followed by Sheldon's move to Texas has left Mary essentially on her own. It doesn't help that Meemaw and Georgie don't live with her, while Missy goes through her rebellious phase. Unfortunately, The Big Bang Theory canon has established that this spiral will only continue, and it's up to Georgie & Mandy's First Marriage to tackle it in a way that doesn't fully vilify Mary.