Marge is just being cautious, what with her being all alone and Nancy acting so nervous lately.
10 seconds sound clip from the A Nightmare on Elm Street movie soundboard.
You can hear this line at 01:04:09 in the Blu-ray version of the movie.
Quote context
[...]
- You know what I think? I think that kid is some kind of lunatic or something.
- Oh, you shouldn't talk that way about that poor child.
- Marge is just being cautious, what with her being all alone and Nancy acting so nervous lately.
- I don't care what you say. I don't want that kid hanging around with our son anymore.
[...]