This sounds like an entirely separate episode than the Christine Ford claim.
Probably a calculated ploy to add another 2-3 weeks delay after Ford testifies (if she ever does) by alleging yet another episode involving Kavanaugh and a woman.
Further details: The accuser is Wilhelmina Kristol, a short dumpy sales agent of cruise cabins for readers of NeverTrump magazines.
She will allege Donald Trump held her down while Brett Kavanaugh abused her with a dildo, sometime in the decades of the late 20th or early 21st century (unfortunately she can't be more precise).
She wants to tell her story publicly but is insisting on an investigation by famed English detective Sherlock Holmes before she will agree to testify before the Judiciary Committee.