Enforceability of Infidelity and Lifestyle Clauses in Michigan Postnuptial Agreements

Current as of: September 24, 2026 Prenuptial & Postnuptial Agreements Michigan
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While Michigan courts recognize postnuptial agreements intended to preserve a marriage, judges strictly scrutinize lifestyle clauses. Severe financial penalties for cheating face high risks of invalidation, and rules regarding personal appearance are routinely struck down as violations of public policy.

As marriages evolve, many couples in Michigan are turning to postnuptial agreements to save their relationships after a breach of trust. Instead of merely dividing assets, these modern contracts often include 'lifestyle clauses.' These clauses dictate personal behavior, imposing financial penalties for infidelity, social media embarrassing posts, or substance abuse relapses. However, because Michigan operates under a strict no-fault divorce system via Mich. Comp. Laws § 552.6, determining which lifestyle rules a judge will actually enforce can be a massive gray area.

Drafting an enforceable lifestyle clause requires precision and a deep understanding of state case law. We highly suggest consulting our USA Lawyers Directory to find a Michigan family law attorney who can craft a postnup that holds up in court. Here is how courts in cities like Ann Arbor, Detroit, and Lansing view these trendy behavioral contracts.

Step-by-Step Breakdown of Lifestyle Clauses in Michigan

Not all rules are treated equally. The Washtenaw County Circuit Court, Ann Arbor and other local courts will examine whether the clause attempts to control financial outcomes or violate fundamental human rights.

Step 1: Cheating Penalties (Financial Consequences for Adultery)

Infidelity clauses are among the most requested lifestyle provisions, but enforcing them in Michigan is fraught with legal hurdles. While Hodge v. Parks, 303 Mich. App. 552 (MI Court of Appeals 2014) established that postnuptial agreements intended to promote marital harmony and preserve the marriage are valid, severe financial penalties face intense judicial scrutiny. Under Wright v. Wright, 279 Mich. App. 291 (MI Court of Appeals 2008) and Skaates v. Kayser, 333 Mich. App. 61 (MI Court of Appeals 2020), agreements that make divorce financially advantageous for one spouse or encourage marital dissolution are void against public policy. Furthermore, because Michigan is a no-fault divorce state under Mich. Comp. Laws § 552.6 and general contract law prohibits punitive damages, a clause demanding that an unfaithful spouse forfeit the marital home risks being struck down as an unenforceable penalty.

Step 2: Social Media Restrictions and NDA Clauses

With the rise of public oversharing, many high-net-worth couples or public figures include Non-Disclosure Agreements (NDAs) and social media bans in their postnups. These clauses state that neither spouse may post disparaging remarks, intimate photos, or financial details on platforms like Instagram or Facebook. Because these are standard privacy contracts, Michigan courts generally enforce them. Violating the NDA can trigger a liquidated damages clause, forcing the offending spouse to pay a massive cash penalty.

Step 3: Sobriety and Addiction Requirements

If a marriage was nearly destroyed by gambling, drugs, or alcohol, a postnup can be used to set strict financial boundaries to protect marital assets from being squandered. A sobriety clause can require random screenings or treatment milestones and outline distinct property allocations. However, caution is required regarding spousal support. Under the binding precedent Allard v. Allard, 318 Mich. App. 583 (MI Court of Appeals 2017), spouses cannot contractually strip a trial court of its statutory equitable discretion under Mich. Comp. Laws § 552.23 to award spousal support or invade separate property if needed for suitable support. As a result, an absolute waiver of support triggered by a relapse may not prevent a judge from granting relief to prevent severe hardship.

Step 4: Weight and Appearance Clauses

Some spouses attempt to mandate physical perfection, inserting clauses that financially penalize a partner if they gain more than 15 pounds or change their hair color. In Michigan, these clauses are almost universally struck down. Judges at the Ingham County Circuit Court, Lansing often view appearance clauses as unconscionable, coercive, and against public policy. Attempting to enforce a weight-gain penalty will likely anger the judge and could cast doubt on the validity of the entire postnuptial agreement.

How Much Does it Cost in Michigan?

Drafting a behavioral postnuptial agreement involves detailed legal work:

  • Custom Drafting Fees: Because lifestyle clauses are highly personalized, expect to pay between $2,500 and $5,000 for an attorney to draft a robust postnup.
  • Independent Representation: Both spouses absolutely must have their own separate attorneys to prevent claims of coercion, adding another $1,000 to $2,000 in costs for the second lawyer's review.
  • Enforcement Costs: Enforcing a breached clause requires filing a divorce or breach of contract suit. Standard filing fees are approximately $175, plus ongoing hourly attorney fees for litigation.

How Long Does the Process Take?

Drafting a postnuptial agreement often takes longer than a prenup because the emotions are usually running high, especially if infidelity recently occurred. Negotiations regarding the exact definition of 'cheating' (e.g., does emotional texting count, or just physical intimacy?) can take 1 to 3 months. If you must enforce the postnup during a divorce, proving the infidelity (gathering text messages or hiring private investigators) can stretch the divorce timeline to 9 or 12 months.

Frequently Asked Questions (FAQ)

How do you prove someone cheated to enforce the penalty?

Your postnup should explicitly define what constitutes proof. Usually, this requires sworn witness testimony, undeniable digital evidence (texts/photos), or a report from a licensed private investigator. Mere suspicion is never enough.

Can a lifestyle clause dictate how often we have intimacy?

No. Clauses mandating physical intimacy are strictly void against public policy. A court will never enforce a contract requiring physical affection, as it violates bodily autonomy laws.

Does a postnup mean we are getting a divorce?

No, the exact opposite. In Michigan, a valid postnuptial agreement must be drafted with the intent to keep the marriage together. If the document is essentially a separation agreement preparing for immediate divorce, different legal rules apply.

Can a lifestyle clause regulate my in-laws' behavior?

You can include clauses stating that a spouse will incur a financial penalty if they allow their toxic family members into the marital home, but you cannot legally bind third parties (the in-laws) who did not sign the contract.

Can I get a lifestyle clause without a lawyer?

While you can legally sign a contract without a lawyer, DIY postnups with lifestyle clauses are almost always thrown out by judges because the legal language required to bypass Michigan's no-fault divorce statutes is highly complex.


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