But do you remember the scene in the restaurant when Daniel's mother asks him about the "girl situation" and Daniel's sly grin is a dead giveaway? Mrs. LaRusso asks, "Is she prettier than Judy?" and Daniel immediately declares, "Oh, ma, she buries Judy!"
Based on Mrs. LaRusso's surprise to her son's answer, this Judy must have been a real looker! But I guess we'll never know for sure.
There's that opening scene of the movie -- literally in the film's first minute -- when Daniel and his mother are pulling away from their old neighborhood in New Jersey. Mrs. LaRusso has just reminded Tony to tell Uncle Louie that some red wine and Parmesan was left in the refrigerator when Daniel calls out "Bye, Judy!"
While one of the two older girls present seems to turn her head towards the car, there is enough of a delay in this action that it's safe to assume that this is not Judy.
But in that same instance, the second girl leans into the passenger side window for a so-long smooch from Daniel.
There you have it.