Nancy

''For the other character with the same first name, see Nancy. ''

Nancy François, or just Nancy by many people, is a mentioned character in Mario The Babysitter! and Jeffy's Sister! and appears in Jeffy's Parents! as the main antagonist. She is a drunk and abusive prostitute who left Jeffy with Mario because she hated him.

1 year later, Nancy Jeffy came over to Mario's house to get Jeffy back after finding out that Jeffy was to inherit a million dollars from his father. Even though she beat up Jeffy and belittled him in front of Mario and Rosalina, Mario didn't care. In the car, she starts beating Jeffy senseless. Jeffy escaped and went back to Mario's house, begging Mario to let him stay with him and the gang. He also genuinely promised to stop annoying Mario and disobeying him. Then, she was arrested for child abuse, prostitution, and a bunch of other things. Mario then decides to adopt Jeffy and let him stay.

Trivia

 * While it's said that Nancy Jeffy and Jacques Pierre François hated him, the note may actually mean that they care about their son and Jeffy may have been kidnapped. This wouldn't have happened if they hate Jeffy.
 * However, it's revealed that Jeffy's mom didn't care, so it's possible Jeffy's Dad, was the only one that cared.
 * Many fans believed that Princess Daisy was Jeffy's mom. However, this was confirmed by Logan to not be true in a stream with SML Reviewer.
 * It was revealed to be her fault Jeffy acts like a jerk towards Mario for an entire year.
 * Nancy may be pregnant
 * Although we do not know what happened to her after she got arrested, it is possible that she got killed by Does Bad Things Guy since he appears in Jeffy's Parents!
 * However in the teaser trailer for the SuperMarioLogan movie, it's revealed she escaped from prison.

Reception
Throughout Jeffy's Parents, Jeffy had flashbacks showing how abusive she was to him. Thus, begins the fandom to believe she is unkind, insincere, and a liar for displaying acts of "affection" to him around Mario and Rosalina. When Nancy abused Jeffy (like restricting him for eating for a week,) this left most of the audience in anger and disgust towards her. The small minority of people who had a deep disliking for Jeffy were glad she abused him, and then gave a reason as to why he "tortures" Mario.

But, the large majority of the audience have a deep disliking towards her, and she is one of the most hated characters in the series

Poll
Do You Like Jeffy's Mom? Yes! Kind Of. No