Former U.S. Senator Kyrsten Sinema publicly acknowledged an affair with her married security detail member Matthew Ammel in March 2026, while his ex-wife Heather Ammel pursues both an alienation of affection lawsuit and a custody modification alleging drug abuse. For Arizona residents watching this unfold, the critical takeaway is this: Arizona abolished alienation of affection claims decades ago, but allegations of substance abuse remain a powerful factor in Arizona custody proceedings under A.R.S. § 25-403.
Key Facts
| Detail | Summary |
|---|---|
| What happened | Former Sen. Kyrsten Sinema admitted to a romantic affair with Matthew Ammel, her married security detail member |
| When | Lawsuit and custody proceedings reported March 2026 |
| Who is affected | Sinema, Matthew Ammel, his ex-wife Heather Ammel, and their three minor children |
| Key legal claims | Alienation of affection (filed in a state that recognizes the tort); custody modification based on alleged substance abuse |
| Arizona relevance | Arizona abolished alienation of affection in 1973; custody decisions governed by A.R.S. § 25-403 best-interest factors |
| Practical impact | Arizona residents cannot sue a spouse's affair partner, but substance abuse allegations can trigger custody modifications |
Arizona Abolished Alienation of Affection in 1973
Arizona is one of approximately 44 states that no longer recognizes alienation of affection as a valid cause of action. The Arizona Legislature eliminated the tort in 1973 through A.R.S. § 25-341, which bars claims for alienation of affection, criminal conversation, and seduction. If a similar situation arose entirely within Arizona, the wronged spouse could not sue the affair partner for damages in an Arizona court.
Only about 6 states still permit alienation of affection lawsuits: North Carolina, Mississippi, South Dakota, New Mexico, Hawaii, and Utah. North Carolina is the most active jurisdiction for these claims, where jury awards have exceeded $8.8 million in high-profile cases. The Ammel lawsuit was reportedly filed in one of these remaining jurisdictions, not Arizona.
This distinction matters for Arizona residents because people sometimes assume they can sue a third party who "broke up" their marriage. Under Arizona law, the answer is definitively no. The state treats marriage dissolution as a matter between the two spouses, and third-party tort claims tied to marital misconduct have been barred for over 50 years.
How Substance Abuse Allegations Reshape Arizona Custody Cases
Allegations of narcotics, alcohol, and psychedelics abuse, like those reported in the Ammel custody dispute, carry significant weight in Arizona family courts. Under A.R.S. § 25-403(A), Arizona courts evaluate 11 specific best-interest factors when determining legal decision-making (custody) and parenting time. Factor 6 explicitly requires courts to consider the mental and physical health of all individuals involved.
When one parent raises substance abuse allegations in Arizona, courts have several tools at their disposal. Under A.R.S. § 25-403.04, a judge can order drug and alcohol testing of either parent. Arizona courts routinely order hair follicle tests, which can detect substance use over a 90-day window, and urine screens that capture use within 3 to 30 days depending on the substance.
A parent with a documented history of substance abuse in Arizona can face restricted parenting time, supervised visitation requirements, or mandatory completion of a substance abuse treatment program before unsupervised contact resumes. Under A.R.S. § 25-403.03, courts can also require ongoing random drug testing as a condition of parenting time.
The standard for modifying an existing custody order in Arizona requires showing a substantial and continuing change in circumstances under A.R.S. § 25-411. Evidence of ongoing drug use that was not present or not known at the time of the original order typically satisfies this threshold. Courts generally require more than a single allegation; documented patterns, failed drug tests, or police reports carry the most weight.
Arizona Is a No-Fault Divorce State
Arizona operates as a pure no-fault divorce state under A.R.S. § 25-312. A spouse need only state that the marriage is "irretrievably broken" to obtain a divorce. Adultery does not serve as independent grounds for divorce, and Arizona courts generally do not consider marital misconduct when dividing community property under A.R.S. § 25-318.
This means that in Arizona, an affair does not entitle the wronged spouse to a larger share of the marital estate. Arizona follows a community property system where assets acquired during the marriage are presumed to be owned equally (50/50) by both spouses. A judge has discretion to make an equitable (not necessarily equal) division, but infidelity alone rarely moves that needle.
The one area where an affair can have indirect financial consequences in Arizona involves wasteful dissipation of community assets. If a spouse spent significant community funds on an affair partner, such as gifts, travel, or housing, the other spouse can seek reimbursement for those expenditures under community property waste doctrine. Arizona courts have awarded reimbursement when a spouse can document specific community funds diverted to a third party during the marriage.
Practical Takeaways for Arizona Residents
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You cannot sue your spouse's affair partner in Arizona. Alienation of affection claims have been barred since 1973 under A.R.S. § 25-341. Do not spend money pursuing a claim that Arizona courts will dismiss.
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Substance abuse allegations require evidence, not just accusations. Arizona courts respond to documented proof: failed drug tests, treatment records, police reports, or testimony from credible witnesses. A bare allegation without supporting evidence rarely results in a custody modification.
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Request court-ordered drug testing early in the process. Under A.R.S. § 25-403.04, you can ask the court to order testing. Hair follicle tests covering 90 days of history are the most comprehensive option available.
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Document community property waste tied to an affair. While the affair itself does not affect property division, money spent on the affair partner can be recovered. Keep records of unusual expenditures, account withdrawals, and gifts.
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Understand that custody modifications require substantial change. Under A.R.S. § 25-411, you must show circumstances have materially changed since the last custody order. New evidence of substance abuse that was previously unknown or has worsened typically qualifies.
Frequently Asked Questions
Can I sue my spouse's affair partner in Arizona?
No. Arizona abolished alienation of affection claims in 1973 under A.R.S. § 25-341. Approximately 44 states have eliminated this tort. Only about 6 states, including North Carolina and Mississippi, still allow these lawsuits, where damages can exceed millions of dollars.
Does adultery affect divorce outcomes in Arizona?
Adultery does not affect property division or serve as grounds for divorce in Arizona. Under A.R.S. § 25-312, Arizona is a pure no-fault state requiring only that the marriage is "irretrievably broken." Community property is divided roughly 50/50 regardless of misconduct, though funds wasted on an affair partner may be recoverable.
How do Arizona courts handle drug abuse allegations in custody cases?
Arizona courts take substance abuse seriously in custody proceedings. Under A.R.S. § 25-403.04, judges can order hair follicle testing (covering 90 days) or urine screens. Confirmed substance abuse can result in supervised visitation, restricted parenting time, or mandatory treatment completion before unsupervised contact resumes.
What does it take to modify custody in Arizona?
A custody modification in Arizona requires proof of a substantial and continuing change in circumstances under A.R.S. § 25-411. New evidence of drug or alcohol abuse, relocation, domestic violence, or a significant change in the child's needs can meet this standard. Courts generally will not modify orders based on minor or temporary changes.
Can a public figure's custody case be sealed in Arizona?
Arizona family court records involving minor children receive some protection, but cases are not automatically sealed. Under Arizona Rule of Family Law Procedure 77, parties can request the court seal specific documents containing sensitive information. Judges evaluate sealing requests by balancing the children's privacy interests against the public's right of access to court proceedings.
This article discusses recent news and provides general legal commentary. It does not constitute legal advice. Every case is unique. Consult a qualified family law attorney for advice specific to your situation.