CROSSOVER: No Arbitration Ambush: Extensive Litigation and a Last-Minute Motion Can Waive the Right to Arbitrate

Rinehart v. Texas Oil Partners Permian BSW1, L.P., 05-26-00092-CV, October 26, 2026.

On appeal from 191st Judicial District Court, Dallas County, Texas

Synopsis

A party may waive a known contractual right to arbitrate by substantially invoking the judicial process in a manner inconsistent with that right. The Fifth Court of Appeals held that nearly two years of litigation activity—followed by the first arbitration demand on the night a summary-judgment response was due—supported denial of the motion to compel arbitration and stay the case under the Federal Arbitration Act.

Relevance to Family Law

Although Rinehart arose from a commercial investment dispute, its waiver analysis readily crosses into Texas family-law litigation. Arbitration clauses may appear in premarital and marital property agreements, mediated settlement agreements, agreements incident to divorce, partnership or company agreements governing closely held marital businesses, and other contracts implicated in divorce or post-divorce litigation. Arbitration also may be requested under provisions of the Texas Family Code, subject to the trial court’s continuing statutory responsibilities in suits affecting the parent-child relationship.

The practical lesson is procedural: counsel who knows of a potential arbitration right should investigate and assert it promptly. A party who first seeks venue relief, answers without mentioning arbitration, litigates discovery disputes, requests or resists substantive judicial relief, participates in injunction proceedings, and waits until a dispositive-motion deadline may lose the ability to remove the dispute from the trial court. The issue is especially consequential in complex divorces involving business entities because an arbitration clause in a company agreement may cover some claims or parties even when the divorce itself remains in district court.

Case Summary

Fact Summary

Texas Oil Partners Permian BSW1, L.P. and Texas Oil Partners Permian BSW2, LP filed suit in December 2023, individually and derivatively on behalf of business entities associated with an oil-reclamation project. They alleged that the defendants had fraudulently induced investments and contributions of money and labor and had mismanaged the project. Their claims included securities fraud, statutory and common-law fraud, negligent misrepresentation, conversion, money had and received, breach of fiduciary duty, and quantum meruit.

During the first three months of the case, the defendants accepted service, moved to transfer venue, and filed an answer containing a general denial and affirmative defenses. None of those filings mentioned arbitration.

The litigation then proceeded through substantial pretrial activity. The parties litigated discovery disputes, resulting in an agreed order compelling discovery and a later sanctions order. The defendants moved for reconsideration of the sanctions order. The plaintiffs sought contempt, additional sanctions, and writs of attachment; the individual defendants opposed that relief. The parties also litigated additional discovery matters, and the plaintiffs obtained a temporary restraining order followed by an agreed temporary-injunction order. Arbitration still was not raised.

The temporary-injunction order set the case for trial on December 8, 2025. On September 5, 2025, the plaintiffs moved for traditional summary judgment on all their claims. The defendants’ response was due September 24. They did not file a summary-judgment response. Instead, on the night the response was due, they filed their first motion to compel arbitration and stay the proceedings.

The trial court proceeded with the scheduled summary-judgment hearing but took the motion under advisement. After the plaintiffs amended their petition to remove the only defendant identified as a member and signatory to the relevant company agreement, the trial court allowed the remaining defendants to amend their motion to compel. The amended motion contended that the nonsignatory defendants could invoke the arbitration provision in the R3 Oil company agreements and requested a stay of all trial-court proceedings.

The trial court ultimately denied the amended motion to compel arbitration and stay proceedings. The defendants pursued an accelerated interlocutory appeal.

Issues Decided

The Fifth Court of Appeals decided the following issues:

Whether the defendants waived a known right to arbitrate by substantially invoking the judicial process before requesting arbitration.
Whether the defendants were entitled to compel arbitration and obtain a stay under § 3 of the Federal Arbitration Act after participating in the litigation for nearly two years.
Whether the timing and extent of the defendants’ litigation activity supported the trial court’s denial of arbitration relief.

Because its resolution of the controlling issues supported affirmance, the court did not reach the appellants’ remaining alternative issue.

Rules Applied

Section 3 of the Federal Arbitration Act requires a court to stay litigation of an issue referable to arbitration upon application of a party that is not “in default in proceeding with such arbitration.” 9 U.S.C. § 3. Waiver may place a party in default and therefore defeat both the request to compel arbitration and the associated request for a stay.

A party waives arbitration when it has knowledge of an existing right to arbitrate and substantially invokes the judicial process in a manner inconsistent with that right. The determination is based on the totality of the circumstances rather than any single filing or deadline.

Relevant considerations may include:

How long the party waited before requesting arbitration;
The amount of litigation activity completed before the request;
Whether the party sought judicial rulings or affirmative relief;
The extent of discovery and discovery-motion practice;
Participation in temporary-injunction or other substantive proceedings;
The proximity of the arbitration request to trial or a dispositive-motion deadline; and
Whether the party’s conduct, viewed as a whole, was inconsistent with an intent to arbitrate.

Under the Federal Arbitration Act, waiver is not conditioned on an arbitration-specific showing of prejudice. See Morgan v. Sundance, Inc., 596 U.S. 411 (2022). Courts apply ordinary waiver principles without creating special procedural rules favoring arbitration. Texas decisions examining substantial invocation likewise evaluate the entire course of the litigation rather than treating participation in one isolated proceeding as automatically dispositive.

Application

The court did not rest its decision solely on the fact that the defendants waited until their summary-judgment response was due. Instead, it considered that timing as the culmination of nearly two years of active trial-court litigation.

The defendants knew of the company agreements on which their arbitration request was eventually based, yet they did not mention arbitration in their answer, motion to transfer venue, or other early filings. The case then proceeded through repeated discovery disputes, an agreed order compelling discovery, a sanctions order, a motion to reconsider that order, contempt and attachment proceedings, and temporary-injunctive relief. Throughout those proceedings, the defendants continued to litigate in the district court without asserting a right to arbitrate.

The procedural posture became particularly significant once the plaintiffs filed a traditional motion for summary judgment and set it for hearing. Rather than responding to the merits, the defendants raised arbitration for the first time on the night their response was due. Trial was then less than three months away.

The later amendment of the plaintiffs’ petition complicated the scope and signatory questions, but it did not erase the preceding litigation history. Even after the trial court permitted an amended motion addressing the revised pleadings and the nonsignatories’ asserted ability to invoke the company agreements, the court could evaluate whether the defendants’ prior conduct was inconsistent with their claimed right to arbitrate.

Viewed cumulatively, the length of the delay, the breadth of the proceedings, the requests for judicial action, and the dispositive-motion posture supported the conclusion that the defendants had substantially invoked the judicial process. The Federal Arbitration Act therefore did not require the trial court to compel arbitration or stay the litigation.

Holding

The Fifth Court of Appeals held that the defendants waived any right to arbitration by substantially invoking the judicial process inconsistently with their known arbitration right. Their nearly two-year delay and extensive participation in the lawsuit supported the trial court’s ruling.

The court also upheld the denial of a stay under § 3 of the Federal Arbitration Act. Because waiver placed the defendants in default with respect to arbitration, the statute did not require the district court to halt the judicial proceedings.

The court affirmed the January 9, 2026 order denying the amended motion to compel arbitration and stay proceedings. It did not reach the appellants’ remaining alternative issue because the waiver determination was sufficient to dispose of the appeal.

Practical Application

Family-law litigators should treat arbitration as an issue requiring investigation at intake, not as an option to be evaluated only after the litigation reaches an unfavorable procedural stage. That investigation should include not only the pleadings and marital agreements but also documents governing businesses, trusts, partnerships, professional practices, and investment entities whose ownership or value is disputed in the divorce.

In a complex-property divorce, a company agreement may require arbitration of disputes concerning distributions, ownership, fiduciary duties, valuation rights, books and records, or management. Even if the district court retains the divorce and property-division issues, entity-level or derivative claims may be subject to arbitration. Counsel should identify those claims early and determine whether to request arbitration, a stay, severance, abatement, or coordinated proceedings.

The same analysis may arise in litigation concerning premarital or marital property agreements. If an agreement contains an arbitration clause, a party should ordinarily plead arbitration as an affirmative matter and promptly move to compel before seeking substantial judicial relief on the merits. Participation in emergency proceedings does not necessarily establish waiver by itself, particularly when court intervention is needed to preserve property or protect a child, but counsel should expressly reserve arbitration rights and tailor the requested relief to immediate preservation concerns.

In a suit affecting the parent-child relationship, arbitration does not displace the trial court’s statutory obligations. Texas Family Code § 153.0071 permits arbitration agreements concerning conservatorship and possession, but the court may reject an arbitration award if it determines that the award is not in the child’s best interest. The statute also contains protections relevant to family violence. Accordingly, counsel must analyze both contractual waiver principles and the Family Code’s independent limits on arbitration.

Temporary orders present another recurring issue. A party may need immediate relief concerning possession schedules, support, exclusive use of property, business operations, or preservation of assets while also seeking arbitration. The motion to compel should be filed promptly, and any request for temporary judicial relief should explain why that relief is compatible with preserving the arbitration right.

Finally, pleading amendments do not necessarily reset the waiver analysis. Adding or dropping parties, removing contract claims, or reframing claims as tort or fiduciary-duty claims may affect arbitrability and scope. But the court still may consider the entire procedural history when deciding whether the party seeking arbitration previously acted inconsistently with that right.

Checklists

Early Arbitration Review

Obtain every premarital agreement, marital property agreement, mediated settlement agreement, and agreement incident to divorce.
Review operating agreements, partnership agreements, shareholder agreements, trust instruments, employment agreements, and buy-sell agreements.
Identify every arbitration provision, delegation clause, governing-law clause, and forum-selection clause.
Determine which parties signed each agreement.
Evaluate whether nonsignatories may enforce or be bound by the arbitration provision.
Map each pleaded and anticipated claim to the potentially controlling agreement.
Determine whether the Federal Arbitration Act, the Texas Arbitration Act, the Texas Family Code, or multiple statutory schemes apply.
Calendar the deadline for filing a motion to compel and request for stay.

Preserve the Arbitration Right

Plead arbitration promptly in the answer or other responsive pleading.
File the motion to compel before extensive merits discovery or motion practice.
Request a stay under 9 U.S.C. § 3 when the Federal Arbitration Act applies.
Expressly reserve arbitration rights in agreed scheduling, discovery, and temporary-order documents.
Avoid requesting merits determinations before presenting the arbitration issue.
Limit judicial requests to relief necessary to preserve property, evidence, business operations, or child safety.
Set the motion to compel for hearing promptly.
Do not assume that merely mentioning arbitration preserves the right indefinitely.

Evaluate Potential Waiver

Calculate the time between the initial appearance and the arbitration request.
Inventory all pleadings, hearings, discovery requests, and motions filed before arbitration was raised.
Identify any affirmative judicial relief requested by the prospective movant.
Determine whether the party participated in injunction, sanctions, contempt, or dispositive-motion proceedings.
Examine the proximity of the arbitration request to trial, mediation, or a summary-judgment deadline.
Assess the litigation history cumulatively rather than focusing on a single filing.
Apply ordinary waiver principles without relying on a special requirement of arbitration-related prejudice.

Respond to a Late Motion to Compel

Build a dated procedural chronology.
Attach or cite the answer and other filings that omitted arbitration.
Identify discovery initiated or resisted by the movant.
Document hearings, orders, and substantive relief sought before arbitration was requested.
Emphasize any approaching trial date or dispositive-motion deadline.
Address whether the movant knew of the agreement throughout the litigation.
Distinguish questions of waiver from separate questions of validity, scope, and nonsignatory enforcement.
Explain why § 3 does not require a stay if the movant is in default through waiver.

Manage Arbitration in a Family-Law Case

Separate arbitrable contract or entity claims from nonarbitrable divorce and status issues.
Determine whether severance or abatement is necessary.
Address temporary support, possession, preservation, and injunction issues while the motion to compel is pending.
Preserve the trial court’s statutory responsibilities regarding children.
Apply Texas Family Code § 153.0071 to conservatorship and possession disputes.
Consider the effect of family-violence allegations on any agreement to arbitrate.
Develop a coordinated schedule for arbitration, valuation, tracing, and the remaining district-court claims.
Preserve appellate deadlines for an interlocutory appeal from an order granting or denying arbitration relief.

Citation

Rinehart v. Texas Oil Partners Permian BSW1, L.P., No. 05-26-00092-CV (Tex. App.—Dallas Oct. 26, 2026, no pet. h.) (mem. op.).

Full Opinion

Read the full opinion.

Family Law Crossover

The crossover mechanism is waiver of arbitration through substantial invocation of the judicial process. When the Federal Arbitration Act governs, a party seeking arbitration ordinarily moves to compel and requests a stay under 9 U.S.C. § 3. The court then addresses the existence and scope of the arbitration agreement, the movant’s ability to enforce it, and any gateway defenses—including whether the movant is in default because it waived arbitration through prior litigation conduct.

In a Texas family-law matter, the issue may arise when a divorce includes claims governed by a premarital agreement, marital property agreement, or closely held business’s governing documents. It may also arise when parties have agreed to arbitrate conservatorship or possession questions under Texas Family Code § 153.0071. If a party proceeds through extensive discovery, temporary-order litigation, business injunctions, sanctions proceedings, or dispositive motions before invoking arbitration, the court may evaluate that entire procedural history in deciding waiver.

The procedural response is early identification and presentation of the arbitration issue. Counsel should plead the right, move to compel, request the applicable statutory stay, and clarify how emergency or temporary family-law relief will proceed while arbitration is considered. If only part of the controversy is arbitrable, the motion should identify the covered claims and request an appropriate stay, severance, or coordinated schedule rather than assuming the entire divorce must leave the district court.

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