Reese: Maybe it's Malcolm's girlfriend come for some kissing.
Lois: Who is this girl?
Malcolm: Mom, don't make such a big deal outta this! [shouts] I didn't tell anyone because I knew this is exactly how you'd react! This is none of your business! It's nobody's business! It's not a big deal, OK? [calmly] Well, it's not. I would appreciate it if we could just drop it.