Backfire

[champagne supernova]

I'm confused...you said that person X told someone else the story, which means person X started the rumor? But person X is also your mother...so your mother told someone who told person Y?

Will rephrase.

So Person Z spread a false story about me. The story went that person X told someone that I was obsessed about person Y. This story reached person Y.
[...]
It gets better though. Person X in this story also happens to be my mother.

Person Z is a potato for saying that my mother told them something about person Y.

Columbo isn't required.