I'm a descendant of slaves. Thanks for asking.
That wasn't the question.
Since you brought it up she was most likely a descendant of slaves.
Now for your original statement attacking her that had nothing to do with policy and is your Kool-Aid opinion.
From Snopes fact check:
However, we have been unable to verify that a line of descent exists between the modern-day Harris family and the 19th-century slave owner. As such, the claim that an ancestor of Sen. Harris owned slaves in Jamaica remains unproven. If evidence emerges that verifies that line of descent, we will update this fact check accordingly.