Mediated Settlement Agreement Enforcement in Divorce | Brennan v. Ralston (2026)

In the Matter of the Marriage of Mary Brennan and John Jefferey Ralston, 13-24-00520-CV, August 28, 2026.

On appeal from 87th District Court of Freestone County, Texas

Synopsis

A party seeking to avoid enforcement of a divorce mediated settlement agreement must actually put on admissible evidence showing a recognized basis for non-enforcement, such as fraud or concealment. In Brennan v. Ralston, the Thirteenth Court held the trial court acted within its discretion in denying a motion to set aside an MSA where the movant relied on an affidavit that was excluded and offered no other competent proof that marital assets had been withheld or that the agreement was otherwise unenforceable.

Relevance to Family Law

This opinion is directly relevant to Texas divorce litigation involving property division after mediation. It reinforces a point family lawyers know but sometimes underappreciate in post-mediation motion practice: complaints about incomplete disclosure, redacted business records, valuation obstacles, or suspected hidden assets do not unsettle an MSA unless the complaining party creates an admissible evidentiary record. The case also has broader significance for SAPCR and custody practitioners because the same strategic lesson applies whenever a party seeks extraordinary post-agreement relief—argument is not evidence, and excluded paper proof is no proof at all.

Case Summary

Fact Summary

Mary Brennan filed for divorce and sought a disproportionate share of the community estate. Discovery focused in part on financial records of several LLCs in which John Jefferey Ralston held an ownership interest. Because the entities objected to broad disclosure, the trial court entered a protective order allowing Brennan’s designated expert to inspect responsive financial records at the LLCs’ office.

The parties later mediated and signed an MSA. Before entry of the final decree, Brennan moved to set aside the MSA on the theory that it had been reached without full disclosure of marital property. Her motion asserted that her valuation expert, Michael Benaglio, had difficulty obtaining needed financial information, had not been allowed to interview Ralston personally, and had received incomplete or redacted materials that prevented meaningful verification of distributions and value. Brennan attached Benaglio’s affidavit to support those assertions.

At the hearing, however, Brennan offered no live testimony. When her counsel stated that the affidavit was the evidentiary support for the motion, opposing counsel objected on hearsay grounds. The trial court sustained the objection, explained that live testimony was required because the affiant was not present for cross-examination, and did not admit the affidavit into evidence. Brennan then rested without calling any witness and without offering any other admissible exhibits.

Ralston, by contrast, presented testimony from counsel for the LLCs, a legal assistant from his counsel’s office, another attorney involved with discovery compliance, and Ralston himself. That testimony supported the position that the LLCs complied with the protective order, that unredacted materials were made available for in-person review, that copies of records were transmitted through Dropbox to Brennan’s then-counsel, that no additional requests or deposition notices were received, and that no marital assets had been concealed. The trial court denied the motion to set aside the MSA, found Brennan had failed to present evidence establishing any basis to avoid the agreement, and signed a final decree consistent with the MSA.

Issues Decided

• Whether the trial court abused its discretion by denying the wife’s motion to set aside a divorce mediated settlement agreement based on alleged nondisclosure of assets where she presented no admissible evidence supporting that claim.
• Whether an affidavit excluded from evidence could support relief from the MSA before entry of the final divorce decree.
• Whether the trial court could proceed to enter a final decree in accordance with the MSA after denying the motion to set it aside.

Rules Applied

The court framed its analysis around the familiar enforcement regime for divorce MSAs under Texas Family Code § 6.602.

• Under Texas Family Code § 6.602(b), an MSA is binding if it contains the required non-revocation language and is signed by the parties and their attorneys, if present.
• Under § 6.602(c), once those statutory requirements are met, a party is entitled to judgment on the MSA notwithstanding Rule 11 or another rule of law.
• Texas Supreme Court precedent recognizes the strong enforceability of statutory MSAs. See Milner v. Milner, 361 S.W.3d 615 (Tex. 2012).
• Intermediate appellate authority has recognized narrow grounds on which an MSA may be avoided, including illegality, fraud, duress, coercion, or similar dishonest means. The court cited decisions such as Morse v. Morse, Boyd v. Boyd, and In re Kasschau.
• The burden rests on the party resisting enforcement to prove the MSA is void or otherwise unenforceable.
• Review of a trial court’s denial of a motion to set aside an MSA is for abuse of discretion.

The practical doctrinal point in the opinion is just as important as the substantive one: a trial court decides these motions on evidence, not allegation. An affidavit excluded on evidentiary grounds is not part of the proof supporting the motion.

Application

The court’s reasoning was straightforward and strategically important. Brennan’s theory depended on proving that the MSA should not be enforced because it was reached without full disclosure of material marital assets. But when the hearing arrived, she did not present the testimony of the expert whose affidavit formed the backbone of her allegations. Once the affidavit was excluded as hearsay, there was nothing left in the record from her side except attorney argument. That was fatal.

The appellate court emphasized the consequence of that evidentiary failure. A party asking the court to set aside a statutory MSA bears the burden to establish a legally recognized basis for non-enforcement. Brennan did not carry that burden because she produced no admissible evidence that assets were concealed, that discovery misconduct undermined the agreement, or that the MSA was procured by fraud or comparable dishonesty.

Meanwhile, the evidentiary record that did exist cut the other way. Ralston’s witnesses testified that the LLCs had complied with the protective-order process, that unredacted records were available for inspection, that documents were transmitted to counsel, and that no undisclosed asset existed. In that posture, the trial court had a reasonable basis to deny the motion and sign the decree.

The opinion also underscores a procedural lesson about timing. Parties sometimes assume that because a final decree has not yet been signed, the trial court has broad flexibility to revisit a mediated property resolution based on generalized fairness concerns or unresolved discovery frustration. This case rejects that practical assumption. Before decree, the MSA remains highly enforceable, and the party trying to derail it must produce competent evidence then and there.

Holding

The court held the trial court did not abuse its discretion in denying Brennan’s motion to set aside the mediated settlement agreement. Because Brennan failed to introduce admissible evidence showing that Ralston concealed assets or that the MSA was otherwise unenforceable, she failed to meet her burden to avoid enforcement of the agreement.

The court also held that the excluded affidavit of Brennan’s expert could not serve as evidence supporting the motion. Once the trial court sustained the hearsay objection and the affiant did not testify, the affidavit was not part of the evidentiary record and could not supply the proof necessary to set aside the MSA.

Finally, the court upheld entry of the final divorce decree in accordance with the MSA. With no evidentiary basis to deny enforcement of a compliant statutory MSA, the trial court was entitled to render judgment on the agreement.

Practical Application

For Texas family litigators, Brennan is a record-building case. If you intend to attack an MSA on the ground that your client agreed without full financial disclosure, you must approach the hearing like a mini-trial, not a pleading conference. The motion itself is irrelevant unless its factual premises are proved with admissible evidence. That usually means live testimony from the valuation expert, the client, the custodian of discovery communications, or all three, along with admitted exhibits showing what was requested, what was withheld, why the missing information mattered, and how the nondisclosure affected the agreement.

The case is especially important in divorces involving closely held businesses, LLC interests, redacted financial records, and protective-order limitations. Those cases often generate legitimate suspicion, but suspicion does not equal proof. If the complaint is that the opposing party blocked interviews, withheld corroborating statements, produced only internally generated summaries, or selectively redacted financial records, counsel must tie those facts to an actual legal basis for avoiding the MSA and must present that proof in admissible form.

The opinion also offers a quiet warning about expert practice. If your challenge to enforceability depends on an expert’s inability to complete a valuation or verification analysis, do not assume the affidavit will come in. Bring the expert. Have the expert explain precisely what documents were requested, what was not produced, why the missing information was material, whether the limitation prevented a reliable opinion, and whether there is a concrete basis to infer concealment rather than mere discovery friction.

On the defense side, Brennan is a strong roadmap for enforcing an MSA. If the other side moves to set it aside, force the evidentiary issue. Object to affidavits offered for the truth without a recognized exception. Require live testimony. Then affirmatively prove compliance with discovery orders, production logistics, transmittal history, and access to records. The better your paper trail and witness sequence, the easier it becomes to frame the movant’s complaint as unsupported dissatisfaction rather than a proven ground for non-enforcement.

The case also has implications beyond property disputes. In custody and settlement-enforcement contexts, whenever one side asks the court to disregard a formal agreement based on alleged misconduct, lack of disclosure, or unfair process, Brennan supports the proposition that the court need not indulge unsupported allegations. The hearing record controls.

Checklists

Challenging an MSA Based on Nondisclosure

• Confirm that your challenge fits within a recognized basis for non-enforcement, such as fraud, illegality, duress, coercion, or comparable dishonest conduct.
• Plead specific facts identifying the allegedly undisclosed asset or category of information.
• Connect the alleged nondisclosure to materiality: explain why it mattered to the settlement decision.
• Subpoena or present live testimony from the expert, client, or records witness.
• Offer admitted exhibits showing the discovery requests, protective orders, production deficiencies, and follow-up efforts.
• Establish not just that records were difficult to obtain, but that they were actually withheld or concealed.
• Be prepared to explain why the issue could not have been addressed before the MSA was signed.
• Preserve error on excluded evidence through a clear offer of proof if necessary.

Presenting Expert Evidence at the Hearing

• Do not rely exclusively on an affidavit if the expert’s factual assertions are contested.
• Bring the expert live so the testimony survives hearsay objections.
• Lay foundation for the expert’s review process and the significance of missing information.
• Have the expert identify precisely which documents were requested and not received.
• Tie the missing information to an inability to value the business interest or detect undisclosed distributions.
• Avoid conclusory testimony; build a factual chain from missing records to probable concealment.
• Make sure all underlying exhibits are separately offered and admitted.

Defending an MSA Against a Motion to Set Aside

• Start with statutory compliance under Texas Family Code § 6.602.
• Force the movant to carry the evidentiary burden.
• Object to affidavits offered for the truth when the affiant is not present and no exception applies.
• Present testimony from the individuals who handled document production and communications.
• Introduce emails, transmittal letters, Dropbox notices, and acknowledgment receipts.
• Show compliance with any protective order and any accommodations made for inspection of sensitive business records.
• Demonstrate the absence of follow-up requests, deposition notices, or motions to compel after production.
• Elicit direct testimony denying the existence of undisclosed assets.

Building a Record for Appeal

• Obtain a ruling on the admissibility of all proffered evidence.
• Ensure excluded key evidence is preserved by offer of proof or bill of exception.
• Request findings of fact and conclusions of law after the ruling.
• Make the burden framework explicit in argument: who must prove what, and why.
• Develop testimony on both availability of records and the significance of any alleged omission.
• If attacking the MSA, do not rest after argument alone.
• If defending the MSA, create a detailed record showing transparency and compliance.

Avoiding the Brennan Problem

• Do not file a motion to set aside an MSA unless you can prove it.
• Do not assume allegations in the motion will be treated as evidence.
• Do not depend on a sworn affidavit where live testimony is readily available.
• Do not leave discovery complaints at the level of general frustration.
• Do not ask the court to infer concealment from redactions or limited access without evidentiary support.
• Do not overlook the need to prove a legally recognized ground for avoiding an otherwise binding MSA.

Citation

In the Matter of the Marriage of Mary Brennan and John Jefferey Ralston and in the Interest of L.M.R., a Child, No. 13-24-00520-CV, memorandum opinion (Tex. App.—Corpus Christi–Edinburg Aug. 28, 2026, no pet.).

Full Opinion

Read the full opinion here

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