- “Why don't I get Beth and we'll go out for ice cream?”
- —The last great idea that will ever be had in this garage.[src]
The manner in which Rick denies being driven by a "totally fabricated backstory" suggests that he was lying to Morty, and that the flashback was in fact a ruse. Therefore, it cannot be guaranteed that Diane is the real Mrs. 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. In that flashback, another Rick from the future vaporized Diane and Beth with a bomb, to punisher Rick. 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.
- Rick maintains a similar appearance as a younger person via Simple Rick in "Tales From the Citadel". This supports the possibility that the real Mrs. Sanchez may have resembled Diane to an extent.