This is where the film drops into complete predictability. We are taken through a series of typical scenes, which are supposed to be funny but mostly are not. For example, Malcolm doesn't know how to cook whereas Big Momma is a great cook. So he has to pretend he can, and he is a complete idiot about it because that's supposed to be funny. It isn't. In another scene, Malcolm tries to get a look at Sherry in her underwear, and falls off of a chair. And there are the usual scenes in which people come into his room when he's not quite ready, and he has to hide his moustache and so on. Of course, in the end, the real Big Momma comes home, and we have the obligatory scene where one Big Momma enters the room just as the other is leaving and no one notices how different they look, except to say "Wow, you changed your clothes so quickly". Finally, this film has the most stupid childbirth scene ever. It's all just so embarrassing to watch. Perhaps I'm too British or something, but this kind of 'humour' just doesn't work.
To be honest, I was often bored while watching Big Momma's House. The only interesting bits were where Malcolm tried to date Sherry as himself. There were a few nice moments in those scenes, but generally the film was silly, irritating and had too many tired old plot mechanisms.