Examples of using "なんで聞くの?" in a sentence and their english translations:
Why do you ask?
- Why do you ask?
- And why do you ask?
- Why are you asking?
"Do you hate me?" "No." "So do you love me?" "Why are you asking?"
If you carelessly ask, "Got a boyfriend?" she'll be put on her guard and say, "Why do you ask?"