Kyrsten Sinema’s sworn testimony has pushed a messy private dispute into public view, with federal court filings saying she admitted to repeated sexual encounters with a married security guard while serving in the Senate. The lawsuit, brought by the guard’s ex-wife under North Carolina’s alienation-of-affection law, has turned a relationship scandal into a high-stakes court fight with testimony, text messages, and timeline disputes at the center.
Heather Ammel’s case says Sinema’s relationship with Matthew Ammel helped tear apart a 14-year marriage. Sinema’s legal team has already tried to knock the case out, arguing the alleged conduct happened outside North Carolina and that the court should not even hear it.
In her July 31 deposition, Sinema said the relationship began around Memorial Day 2024. She described one encounter in Napa, California, saying, “We were staying at an Airbnb in Napa, California. We were outside. Matt kissed me. We went inside and had sex,” according to the transcript filed with the court.
From there, the relationship allegedly kept going in a string of cities and settings that read like a tabloid tour, but with legal consequences attached. Sinema said they were intimate in New York City during the wedding of CNN anchor Jessica Dean, then again in Washington, D.C., after a red-eye flight, and later during a fundraising trip to Aspen.
The testimony also says the affair continued into October 2024 at Sinema’s house in Phoenix. Sinema acknowledged that she knew Ammel was married and had three children during all of this, which gives the case a harder edge than the usual political gossip cycle.
Some of the details in the filings come from text messages that now sit at the center of the dispute. In one exchange, Sinema wrote, “Putting my hand on your heart. I’ll see you soon. I miss you,” and when asked how a wife might react to that message, Sinema answered, “Yes,” after the lawyer suggested it could be upsetting.
Another message surfaced through Heather Ammel’s testimony, where she read a note she found on her husband’s phone. The message said, “I hope your day was okay. Thinking of you. I am with you. I keep waking up during my sleep and reaching over for your arms to hold me,” a line that is now part of the court record.
Heather Ammel said she learned about the affair after her husband came home “severely intoxicated” while they were staying at her parents’ house. She later described Sinema in harsh terms and said her husband was the one trying to steer everyone around with lies and manipulation, which adds another layer of personal chaos to the case.
The legal fight is happening under North Carolina’s alienation-of-affection law, a throwback statute that still allows a spouse to sue a third party accused of causing a marriage to collapse. That makes the case less about modern politics and more about old-school family law, where private conduct can still end up on a public docket with real financial stakes.
Sinema, who left the Senate at the beginning of last year, is now facing a hearing set for Aug. 19. Between the deposition transcript, the text messages, and the ex-wife’s testimony, the case has already become the kind of courtroom drama that keeps widening every time another filing drops.
