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I am sorry to hear about this situation.
While this may seem heavy-handed, if she is really bothering you that much, consider using an attorney to send a cease and desist letter, threatening a suit for defamation if she does not comply.
A defamation plaintiff must establish four essential elements to recover: (1) falsity; (2) an unprivileged communication; (3) fault; and (4) damages. Mark v. Seattle Times, 96 Wn.2d 473, 486, 635 P.2d 1081 (1981); Sims v. KIRO, Inc., 20 Wn. App. 229, 233, 580 P.2d 642 (1978); Restatement (Second) of Torts § 558 (1977), Bender v. Seattle, 664 P. 2d 492 - Wash: Supreme Court 1983.
In essence, you can sue someone for spreading lies about you.
The letter does not have to come from an attorney; it can come from you. However from an attorney it would seem more menacing. Let me know if you need an example of such a letter.
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