This scene (The party has traveled back in time):
Loni: Hey, Kyle. If we were to meet Mr. Stan and Mrs. Rutee (Kyle's parents), make sure not to reveal your identity.
: Ahh! Right! ... Ah, but how? I don’t have anything else to dress myself in ...
Loni: ... Maybe you could borrow Judas‘s mask?
Kyle: Oooh! What a great idea! So Judas, how about giving me your mask ...
: And thus reveal my identity
, long before they would recognize an unborn child? Don't be stupid.
Loni: ... Pfff! Ahahahah! IIIH! M-MY STOMACHAHAHAHAH!