- “This was a good breakfast, Beth. You really made the crap out of those eggs. I wish your mother was here to eat them.”
- —Rick referring to his ex-wife.[src]
Mrs. Sanchez has never physically appeared in the series, and her identity remains unknown.
In the pilot episode, Rick compliments his daughter Beth's breakfast. This comment brings a tear to Beth's eye, which suggests that her mother may be deceased.
In "Rick Potion #9", Rick reflects on his marriage indirectly when he describes love as being "just a chemical reaction that compels animals to breed", and tells Morty that he was part of a failing marriage. Beth C-137 later mentions that Rick indeed left her mother.
At the conclusion of "Auto Erotic Assimilation", Beth insists to Rick that she could never sacrifice her family's safety just to keep him in her life. At this point, Beth realizes that she sounds like her mother, suggesting that Mrs. Sanchez valued her family's safety over Rick's scientific experiments.
In "The ABC's of Beth", Beth ask Rick why he would make a clone of her so she can have some time for herself. He replies that it may have had to do with her mother, which indicates that Rick still cares about Mrs. Sanchez.
Main Article: Diane Sanchez
When Rick was being held in a Galactic Federation prison, Cornvelious Daniel went into Rick's memories, via a brain-link, to learn how Rick became a criminal. While Daniel was present in Rick's memories, he witnessed a flashback in which a young woman named Diane Sanchez was the wife of Rick Sanchez and the mother of Beth Smith. Diane appeared to enjoy her husband Rick's scientific work and seemed very patient and understanding, with no reference to either a failing marriage or an extreme concern about safety. In that flashback, another Rick from the future vaporizes Diane and Beth with a bomb, to punish Rick. The "present" Rick denies being driven by a "totally fabricated" backstory, but the manner in which he does so suggests that he was lying to Morty, who had seen none of it.
Therefore, it cannot be guaranteed that Diane is the real Mrs. Sanchez.
Behind the Scenes
Very little has been discussed about Mrs. Sanchez, even by the series' creators. Dan Harmon has said on multiple occasions that she was "unremarkable", later suggesting she was more comparable to Jerry, and that this was connected to Beth's idolization of Rick.
In "Close Rick-Counters of the Rick Kind", Rick is shown with a memory of having sex with a blonde woman, but she was confirmed to be different from Mrs. Sanchez.
Giahna Pantano, the cover artist for Oni Press' Rick and Morty comics, has created a character named "Bonnie Sinclair", who represents a possible "Mrs. Sanchez". Bonnie has become popular with fans.