So, is this a trap situation? Trying to get her to deny it, then pointing out that her denial shows racism if she said "I could/would never do that"?
Once she denies one allegation, expect a never ending stream of them. She’s not that stupid.
The response to an allegation is not to confirm or deny it. Rather, it is to question the motives of the person bringing the allegation (among other things).
The only allegations that count are the ones legally served.