Lead: Former U.S. Sen. Kyrsten Sinema has acknowledged in court filings that she entered a romantic relationship with a member of her security detail beginning in late May 2024, documents show. The relationship and subsequent communications are central to a North Carolina lawsuit filed by Heather Ammel, who says the contact contributed to the end of her marriage. Sinema and her attorney argue the ties to North Carolina are minimal and that the suit should be dismissed; the case has been moved to federal court in January 2026. The dispute now combines personal allegations with questions about jurisdiction and the uncommon “alienation of affection” claim available in some states.
Key Takeaways
- Kyrsten Sinema disclosed a romantic relationship with Matthew Ammel that began at the end of May 2024, according to a March 7, 2026 signed declaration attached to court filings.
- Sinema said the relationship was “physically intimate” over several months in multiple jurisdictions, including California, New York, Colorado, Arizona and Washington, D.C.
- Heather and Matthew Ammel separated in November 2024; Heather Ammel filed suit late in 2025 alleging Sinema interfered in the marriage.
- The case was removed from North Carolina state court to federal court in January 2026; Sinema seeks dismissal arguing limited contacts with North Carolina.
- North Carolina permits an “alienation of affection” cause of action, a civil claim that allows a spouse to seek damages from a third party alleged to have caused the marriage breakdown.
- Sinema previously served as a U.S. representative and then one Senate term for Arizona; she did not seek Senate reelection in 2024 and now works for a Washington-based legal and lobbying firm.
Background
The suit was filed by Heather Ammel, who alleges in court papers that she and her husband Matthew had “a good and loving marriage” until third-party interference. Under North Carolina law a spouse can seek monetary damages if a third party is proven to have intentionally destroyed marital affection; such claims remain rare but actionable where permitted. Sinema employed a former Army service member as head of security; the lawsuit says that head of security later hired Matthew Ammel after his Army retirement in 2022.
According to the complaint and Sinema’s declaration, messages of a romantic nature between Sinema and Matthew Ammel were discovered by Heather Ammel in early 2024 on the Signal app. The Ammels’ separation is listed as November 2024 in the court filings. The complaint was initially lodged in North Carolina state court late in 2025 and was removed to federal court in January 2026, where Sinema’s legal team has filed a response and a motion to dismiss.
Main Event
Sinema’s signed declaration, dated March 7, 2026 and attached to her response, states that the relationship “became romantic and intimate” at the end of May 2024 and was physically intimate over the following months in several states and Washington, D.C. The declaration is part of a broader filing asking the federal court to dismiss Heather Ammel’s claim on jurisdictional and factual grounds. Sinema’s attorneys say contacts with North Carolina were limited and that one message sent while Matthew Ammel was in North Carolina occurred after he had already moved out and the marriage was effectively over.
The Ammels’ complaint alleges that Sinema knowingly pursued Matthew Ammel despite his marital status and that her communications and actions led to the breakdown of the marriage. It also recounts that Matthew stopped wearing his wedding ring in the summer of 2024 and that Sinema later employed him on her Senate staff while he continued serving as a bodyguard, details included in the complaint.
Legal counsel for Sinema, led in filings by attorney Steven Epstein, characterizes the North Carolina connections as insufficient to sustain the lawsuit. Epstein asked the court to dismiss the case, arguing that the conduct described does not meaningfully connect Sinema to North Carolina and that no reasonable jury would find that a single message had the causal effect alleged by the plaintiff.
Analysis & Implications
The case sits at the intersection of personal conduct, employment relationships and an uncommon tort that remains actionable in only a small number of U.S. states. If the court accepts Sinema’s jurisdictional and factual arguments, it could close a pathway to damages for plaintiffs who bring alienation claims against out-of-state defendants; conversely, denial of dismissal would push the case into discovery and likely protracted litigation. Lawyers familiar with interstate jurisdiction disputes say courts will weigh where communications were sent, where alleged harm occurred and the defendant’s purposeful contacts with the forum state.
For Sinema personally and professionally, the lawsuit carries reputational risk even if it is dismissed; the public record created by pleadings and declarations can shape media narratives and political capital. Sinema’s post-Senate employment at a Washington-based legal and lobbying firm places her back in a professional environment where reputation matters for client relationships and public-facing roles.
For tort law more broadly, this case highlights how states that retain alienation-of-affection claims can see those laws applied across state lines, raising questions about forum shopping and the limits of state-court remedies against public figures with interstate activity. A federal court ruling on jurisdiction could set or clarify standards for when out-of-state relationships and communications permit suit under these statutes.
Comparison & Data
| Key Date | Event |
|---|---|
| End of May 2024 | Sinema acknowledges relationship with Matthew Ammel began |
| Summer 2024 | Plaintiff alleges Matthew stopped wearing wedding ring; messages discovered |
| November 2024 | Ammels separated (per complaint) |
| Late 2025 | Complaint initially filed in North Carolina state court |
| January 2026 | Case removed to federal court |
| March 7, 2026 | Sinema signed declaration attached to response |
The table summarizes the timeline drawn from filings and press reports. While the sequence of dates is clear in the public filings, the causal links alleged by the plaintiff—whether specific messages or interactions caused the marriage’s end—remain contested and are subject to discovery and legal proof.
Reactions & Quotes
Legal filings and statements framed the dispute in jurisdictional and factual terms rather than purely personal ones. Sinema’s attorney emphasized the limited connection to North Carolina as a central ground for dismissal.
“[Her] conduct related to her romantic relationship with Mr. Ammel does not connect her to North Carolina in a meaningful way.”
Steven Epstein, attorney for Kyrsten Sinema (court filing)
The plaintiff’s complaint uses stronger language to describe the impact on the marriage and the alleged intent of the third party. That phrasing underpins the legal theory pursued in a state that still recognizes alienation-of-affection claims.
“Ammel contends she and husband Matthew had ‘a good and loving marriage’ and that genuine love and affection existed between them before Sinema interfered.”
Plaintiff’s complaint (Heather Ammel)
Observers in media and legal circles note the blend of privacy and public-interest elements in cases involving public figures, with some commentators stressing the need to follow court records rather than speculation.
Unconfirmed
- Whether the messages and interactions singled out in filings were the direct and proximate cause of the marriage’s end is disputed and not yet proven.
- The specific damages Heather Ammel seeks in North Carolina court were not detailed in public reporting; the amount and calculation remain to be confirmed in filings.
- Full content and context of all communications between Sinema and Matthew Ammel beyond what is summarized in filings are not publicly available and remain subject to discovery.
Bottom Line
The case combines a personal relationship involving a former senator with a rarely used state tort and jurisdictional contest. Sinema’s court filings acknowledge a relationship that began in May 2024 while arguing that her contacts with North Carolina are insufficient to sustain the alienation claim there. The federal court’s handling of the motion to dismiss and any subsequent discovery will determine whether the dispute resolves quickly or proceeds to protracted litigation.
Readers should watch two tracks: the legal threshold the court applies to jurisdiction and causation, and the documentary record that emerges if the case continues. Either outcome will clarify how courts treat similar cross-jurisdictional alienation claims involving public figures going forward.
Sources
- The Seattle Times (news — republishing AP wire story with court filing details)
- The Associated Press (news wire — original reporting credited in published article)