Corrected entry: At the beginning of the film, when Jim is having make up-sex, the girl asks if he's sure he doesn't want to go back to her room, meaning they are in Jim's room. So after Jim's parents walk in, how does the girl's parents know what room she is in? I doubt she would tell her parents where she would be having sex.
Correction: If you listen you will hear her mom say "is that Natalie" and "did I hear Natalie's voice " She heard her talking, that's how she knew what room she was in.
Factual error: The end credits to the movie, which features the Harvey Danger song "Flagpole Sitta" (1997), incorrectly credits it as "I'm Not Sick But I'm Not Well" by LIT. No such song exists, nor have LIT or any other group ever officially recorded covers of "Flagpole Sitta."
Suggested correction: Please indicate which version you saw this on (and possible screenshot). All the versions I've seen, including IMDB, don't even list this song (or it's incorrect title) in the credits. LIT is only credited for 2 songs; "Last Time Again" and "Place in the Sun" for "American Pie 2." The song "Flagpole Sitta" by Harvey Danger does appear in the first "American Pie" film, however the credits I've seen, including IMDB, gives the correct title and correct performed by credit.
Correction: Her roommate would have probably told her parents that she was in her boyfriend's room, and which room it was. Her roommate wouldn't have known they were having sex either, as it was spur-of-the-moment make-up sex, just as is stated above.
Jazetopher
You can hear the parents in the hallway saying they heard the daughter.