Correct and idiomatic?

Hi. Please let me know if this is grammatically correct and idiomatic:

Daughter: Can't you turn some light on then?

Demented mom: No. They've cut the power.

Daughter: Who're 'they'? Is it burglars?

Demented mom: No.

Daughter: Then who?

Demented mom: It's my neighbors.

Daughter: Why would your neighbors cut your power, mom?

Demented mom: Because they don't like me. I've told you.