Has anyone ever said you are "too sensitive" and "just imagining" things? These are the very words you're likely to hear from a female narcissist, if you ever decide to confront her. Narcissists don't like to be held accountable for their behavior, so they'll wriggle out of any suggestion they did anything wrong.
Malignant narcissists also like to set up scenarios to make you uncomfortable. For instance, they may recruit a third party to dole out some form of punishment or abuse, while they watch you squirm. Then, if you happen to mention it, they'll accuse you of being "too sensitive." This is how their disordered minds operate.
This is also an example of two tools in a narcissist's bag of abuse techniques. The first is invalidation, in which they assault your dignity by trying to convince you that something didn't happen, and that you're the one with the problem. (So it's you that needs to get over it.)
The other tool is called gaslighting, a psychological device that attempts to make you doubt your own perceptions, and, in extreme instances, your very sanity. It's named after a vintage movie called "Gaslighting," in which a deranged husband tries to drive his wife crazy by moving things in their home, and concocting various scenarios that raise questions of her recall of events.