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"My Baby!"
— Nancy expressing her concern to Jeffy

Nancy Jeffy François is the abusive mother and archenemy of Jeffy.

She is an alcoholic, crazy, and abusive prostitute who abandoned her oldest son, Jeffy with Mario because she hated him for unknown reasons. But when they're in front of other people, she acts nice to him. However, she hit Jeffy in front of Mario and Rosalina in Jeffy's Parents! after Jeffy told Mario and Rosalina what happened when she abandoned him.

She was a mentioned character in Mario The Babysitter! and Jeffy's Sister! and finally debuts in Jeffy's Parents! as the main antagonist.

She also appears in a flashback of Jeffy's Sister Returns!.


Not much is known about Nancy's childhood, and it's unknown if she had good parents or not.  

She later married Jacques Pierre François in the spring of 1998 and gave birth to Jeffy and Feebee in a porta potty on August 21, 2004 in Paris, France. At some point, when Jeffy and Feebee were young, Nancy took Feebee's helmet away, which led to her death in a bike accident. 

One year after the events of Mario The Babysitter!, Nancy comes to Mario's house to get Jeffy back after finding out that Jeffy was to inherit millions of dollars from his father, Jacques Pierre François, who had committed suicide for the sake of his artwork. Even though she beat up Jeffy and belittled him in front of Mario and Rosalina, Mario didn't care, while Rosalina is concerned. In the car, she starts hitting Jeffy, but he jumps out of the car and runs back to Mario's house, and begs Mario to let him stay with him. He also genuinely promises to stop annoying Mario and disobeying him (which he eventually breaks). After thinking about it, Mario decides to let Jeffy back in the house, but only until his mother returned. Mario would then call the police on her, and as Nancy returns to the house to reclaim Jeffy, she starts to assault him once more, before getting arrested for child abuse, prostitution, and "a bunch of other things." Mario then decides to adopt Jeffy and let him live with him and Rosalina, as long as he behaves.

Likes and Dislikes


  • Smoking
  • Money
  • Prostitution
  • Thievery
  • Drugs and Alcohol
  • Not showering for two months
  • Lying
  • Abusing Jeffy and Feebee
  • Committing crimes
  • Jacques Pierre François's money


  • Charleyyy & Friends (possibly)
  • Jeffy
  • Having no money
  • Getting arrested
  • Feebee
  • Jeffy disliking her and refusing to stay with her
  • Mario
  • Rosalina


  • When Brooklyn T. Guy  said that Nancy is arrested for "a bunch of other things", it can be assumed that Nancy was charged with motor vehicle theft, prostitution, child abuse, child neglect, and child abandonment. Her prison sentence is unknown, but due to Florida's laws about M.V.T, it'll be at least 10 years.
    • Since she was arrested in 2017, she will get out of prison by at least 2027, assuming that she never escapes prison or any appeal happens. Currently, she has 7 years of prison left.
    • If Nancy was pregnant (since she said she doesn't even know), she would have given birth to her child in prison between January and September 2017, but the baby would have been placed in foster care due to Nancy's criminal record.
  • She was set to return in The SuperMarioLogan Movie! as the main antagonist prior to the film's cancellation.
  • Her abusing Jeffy and abandoning him is most likely one of the reasons why Jeffy is bad. It is most likely he had a rough childhood before he was 11.
  • She is shown to be the most evil character in the SML series due to her abusing Jeffy and abandoning him and causing so many terrible things to happen.
  • She is a gold digger since she only wanted Jacques Pierre François solely for his money.
  • She is one of the most disliked characters in the SML series over what she has done to Jeffy in Jeffy's Parents! as lots of people care for Jeffy.
  • Nancy has a set of tattoos on both of her arms.
    • Oddly enough, if you look closely at her left arm, you may notice a heart with what appears to be 'Jeffy' written inside it, implying Nancy may have cared about Jeffy at one point.
  • She is the only biological relative of Jeffy who is still alive.
  • It is likely that Jeffy learned profanity from her. Mario and Rosalina even believed that was the case in Drawing Jeffy!
  • In all likelihood, Nancy is so named to comply with a fan theory amongst SML fans before Jeffy's parents were identified. In Jeffy's Sister!, two diaper pats can be heard during the end card, signifying that his mom's name contains two syllables. This led many fans to believe that his mom was Princess Daisy, since she was described in Mario Plush Collection! as being "stupid" and "in videos eventually.". This was later deconfirmed.

Criminal record

Even though she barely appears in videos, she has a load of criminal records for what she did.

  • Child Abuse: She abused Jeffy a lot.
  • Child Neglect: She didn't really care a lot about both Jeffy and Feebee, that's why she dropped them both off at the Apartment.
  • Manslaughter: Feebee died in Nancy's care.
  • Prostitution: She charged Mario $1 to spit on him.
  • Grand Theft: She said to Jeffy that she stole the car that they were driving in.


Do you like Nancy?

The poll was created at 20:48 on August 8, 2019, and so far 315 people voted.
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