PATRICK E. HIGGINBOTHAM, Circuit Judge:

This appeal concerns the scope of the probate exception to federal subject-matter jurisdiction in the wake of the Supreme Court's decision in Marshall v. Marshall.1 The Plaintiff contends that, under Marshall, her claims for breach of fiduciary duty against the co-trustees of an inter vivos trust do not implicate the probate exception. We agree.

I.

In 1996, Elmer H. and Nelva E. Brunsting, Texas residents, established the Brunsting Family Living Trust ("the Trust") for the benefit of their offspring. At the time of its creation, the Trust was funded with various assets. Both the will of Mr. Brunsting and the will of Mrs. Brunsting (collectively "the Brunstings' Wills") appear to include pour-over provisions, providing that all property in each estate is devised and bequeathed to the Trust.2 Elmer H. Brunsting passed away on April 1, 2009, and Nelva E. Brunsting passed away on November 11, 2011. The current dispute arises out of the administration of the Trust.

Candace Curtis, Anita Brunsting, and Amy Brunsting are siblings. In February 2012, Candace Curtis ("Curtis") filed a complaint in federal district court against Anita Brunsting and Amy Brunsting (collectively "the Defendants") based on diversity jurisdiction. In that complaint, she alleged that Anita and Amy, acting as co-trustees of the Trust, had breached their fiduciary duties to Curtis, a beneficiary of the Trust. Specifically, she alleged that Anita and Amy had misappropriated Trust property, failed to provide her documents related to administration of the Trust, and failed to provide an accurate and timely accounting. The complaint alleged claims for breach of fiduciary duty, extrinsic fraud, constructive fraud, and intentional infliction of emotional distress. Curtis sought compensatory damages, punitive damages, a temporary restraining order against "wasting the estate," and an injunction compelling both an accounting of Trust property and assets as well as production of documents and accounting records.

On March 1, 2012, the district court denied Curtis's application for a temporary restraining order and injunction because the Defendants had not been served with process. In the order, the district court judged noted that it "appears that the court lacks subject matter jurisdiction over the claim(s) asserted." On March 6, 2012, in response to the lis pendens Curtis had filed related to property in Texas and Iowa, Anita and Amy filed an emergency motion to remove the lis pendens. The motion noted that it was subject to the Defendants' contention that the federal district court lacked subject matter jurisdiction under the probate exception to federal court jurisdiction, an issue that the Defendants said would be raised in a separate Rule 12(b) motion to dismiss. On March 8, 2012, following a telephone conference with the parties, the district court judge entered a sua sponte order dismissing the case for lack of subject matter jurisdiction. In doing so, he concluded that the case falls within the probate exception to federal diversity jurisdiction. This appeal followed.

II.

This Court reviews de novo a district court's dismissal for lack of subject-matter jurisdiction.3

III.

Although a federal court "has no jurisdiction to probate a will or administer an estate,"4 in Markham v. Allen, the Supreme Court recognized that the probate exception does not bar a federal court from exercising jurisdiction over all claims related to such a proceeding:

Sixty years later, in Marshall v. Marshall, the Supreme Court expressed concern with lower courts' interpretation of Markham, noting that "[l]ower federal courts have puzzled over the meaning of the words `to interfere with the probate proceedings,' and some have read those words to block federal jurisdiction over a range of matters well beyond probate of a will or administration of a decedent's estate."6 Thus, the Supreme Court clarified the "distinctly limited scope" of the probate exception,7 explaining:

The Marshall Court concluded that the federal district court had subject-matter jurisdiction, and the probate exception did not apply, reasoning: "[The claimant] seeks an in personam judgment against [the Defendant], not the probate or annulment of a will. Nor does she seek to reach a res in custody of a state court."9 After Marshall, the probate exception only bars a federal district court from (1) probating or annulling a will or (2) "seek[ing] to reach a res in custody of a state court" by "endeavoring to dispose of [such] property."10

As we see it, to determine whether the probate exception deprives a federal court of jurisdiction, Marshall requires a two-step inquiry into (1) whether the property in dispute is estate property within the custody of the probate court and (2) whether the plaintiff's claims would require the federal court to assume in rem jurisdiction over that property. If the answer to both inquiries is yes, then the probate exception precludes the federal district court from exercising diversity jurisdiction. Here, we find the case outside the scope of the probate exception under the first step of the inquiry because the Trust is not property within the custody of the probate court.

As a threshold matter, the probate exception only applies if the dispute concerns property within the custody of a state court. The federal court cannot exercise in rem jurisdiction over a res in the custody of another court. Both of the Brunstings' Wills were admitted to probate after the district court dismissed the case, and probate proceedings are ongoing.11 However, nothing suggests that the Texas probate court currently has custody or in rem jurisdiction over the Trust. It likely does not. Assets placed in an inter vivos trust generally avoid probate, since such assets are owned by the trust, not the decedent, and therefore are not part of the decedent's estate.12 In other words, because the assets in a living or inter vivos trust are not property of the estate at the time of the decedent's death, having been transferred to the trust years before, the trust is not in the custody of the probate court and as such the probate exception is inapplicable to disputes concerning administration of the trust. The record also indicates that there would be no probate of this Trust's assets upon the death of the surviving spouse.13 Finding no evidence that this Trust is subject to the ongoing probate proceedings, we conclude that the case falls outside the scope of the probate exception. The district court below erred in dismissing the case for lack of subject-matter jurisdiction.

IV.

For the reasons set forth above, we REVERSE the district court's dismissal of the case and REMAND for further proceedings. REVERSED AND REMANDED.