No, of course not. It is much more likely that your friend has telepathic abilities that she has not yet learnt to control. You are both very young. Knowledge may literally seep out of her mind.

Still, I'd be wary of telling her any further secrets until her mystic abilities have matured.

Unless of course, it is you who is telepathic. In which case you will be subconsciously broadcasting your masturbation preferences to everybody you meet and there really isn't anything you can do about it until you grow up.