Adedamola Alagoke Oni, M.D. (Dr. Oni) appeals from an order depriving him of custody of minor twins that he adopted after their biological mother, Cassondra Oni (Ms. Oni), surrendered her parental rights to the children. Because the trial court impermissibly relied upon its equity jurisdiction in ruling on the custody issue, we reverse the judgment and remand the case.

This is the third appearance of this case before this Court. The first two appearances are set out at Oni v. Oni , 323 Ga. App. 467 , 746 S.E.2d 641 (2013) (physical precedent only) (hereinafter, Oni I ), and Oni v. Oni , 336 Ga. App. 278 , 784 S.E.2d 112 (2016) (hereinafter, Oni II ). For purposes here, we recite the following background.

After meeting in 2009, Dr. Oni and Ms. Oni 1 began a [romantic] relationship. They discussed the possibility that Dr. Oni would adopt the twins, who were not his biological children. In April 2010, Ms. Oni and her then three-year-old twins moved into Dr. Oni's home. One month prior to that, in March 2010, Ms. Oni and the twins' natural father had surrendered their parental rights to facilitate the twins' placement for adoption. Notably, the surrender documents executed by Ms. Oni stated, inter alia, that she agreed that Dr. Oni *777 "may initiate legal proceedings for the legal adoption of the children without further notice to me. I do, furthermore, expressly waive any other notice or service in any of the legal proceedings for the adoption of the children." A final decree of adoption was granted to Dr. Oni on August 24, 2010.

(Footnotes omitted.) Oni II , 336 Ga. App. at 279 , 784 S.E.2d 112 , citing Oni I , 323 Ga. App. at 467-468 , 746 S.E.2d 641 .

Nearly a year later, and with the relationship between Dr. Oni and Ms. Oni having ended, Ms. Oni filed a motion on July 1, 2011 in Fulton County Superior Court to set aside the adoption. Oni I , 323 Ga. App. at 468-469 , 746 S.E.2d 641 . Dr. Oni countered that the motion to set aside the adoption decree was statutorily time-barred. Id. at 469 (1), 746 S.E.2d 641 . The trial court rejected Dr. Oni's contention, and granted Ms. Oni's motion to set aside the adoption. Id. at 469 , 746 S.E.2d 641 . Also, the trial court granted temporary custody of the twins to Ms. Oni. Id. at 470 (1), 746 S.E.2d 641 .

In Oni I , Dr. Oni contended that the trial court erred by granting Ms. Oni's motion to set aside the adoption and giving her temporary custody of the twins. Oni I , 323 Ga. App. at 467 , 746 S.E.2d 641 . After determining that the adoption decree had been entered pursuant to OCGA § 19-8-18 (b), Oni I recited that " OCGA § 19-8-18 (e) provide[d] that '[a] decree of adoption issued pursuant to subsection (b) of this Code section shall not be subject to any judicial challenge filed more than six months after the date of entry of such decree.' " 2 Oni I , 323 Ga. App. at 469 (1), 746 S.E.2d 641 . 3 Oni I next calculated that Ms. Oni's challenge had been filed approximately ten months after entry of the adoption decree, then turned to Ms. Oni's argument that the statutory six-month period in which to challenge an adoption had been tolled by Dr. Oni's (alleged) fraud in concealing the adoption decree from her. Id. Oni I determined that "the language of the statute is unequivocal" and that "the language of OCGA § 19-8-18 (e) brooks no exception." Oni I , 323 Ga. App. at 470 (1), 746 S.E.2d 641 . Accordingly, Oni I concluded that Ms. Oni's motion to set aside the adoption was time barred, reversed the contested judgment, and remanded the "case to the trial court for proceedings not inconsistent with [that] decision, necessarily leaving to the trial court's determination whether there [were] appropriate proceedings available to facilitate a transition of the children from Ms. Oni's care to Dr. Oni's care." Oni I , at 470 (1), 746 S.E.2d 641 . Ms. Oni's petition for certiorari was denied by the Supreme Court of Georgia. 4

After the remittitur was entered in the trial court, Ms. Oni filed, and the trial court granted, an amended motion to set aside the adoption. Oni II , 336 Ga. App. at 281 , 784 S.E.2d 112 . Subsequently, in Oni II , Dr. Oni contended that the trial court lacked authority to set aside the adoption decree, and we agreed. Id. at 282 (1), 784 S.E.2d 112 ("Right or wrong, [ Oni I ] was a final determination of the validity of the adoption decree, and conclusive of that question as between Dr. Oni and Ms. Oni.") (punctuation and footnote omitted). Therefore, Oni II reversed the judgment, and remanded the case with direction for the trial court to enter judgment in accordance with Oni I . As Oni II further espoused:

*778 Where the trial court, after hearing a motion to set aside a prior order in a pending case vacates the judgment complained of, and on appeal the trial court's decision is reversed ..., judgment of the appellate court is final. Upon the remittitur from the appellate court being filed in the trial court, the issue is res judicata, and the lower court has no authority to allow the movant to amend his motion. Nor can it hear further evidence or consider any other matter that would otherwise affect the finality of the judgment of this court. The only action which that court had authority or power to take was to make the judgment of [the appellate] court the judgment of the trial court and to enter an order overruling the motion to vacate.

Oni II , 336 Ga. App. at 282 (1), 784 S.E.2d 112 , quoting Shepherd v. Shepherd , 243 Ga. 253 , 254-255, 253 S.E.2d 696 (1979).

Upon the remittitur being filed in the trial court, Ms. Oni did not again seek to set aside the adoption. However, she initiated a separate action in the Fulton County Superior Court, filing on May 13, 2016 a "Petition to Establish Custody, Parenting Time, and Child Support and Other Relief." Ms. Oni asserted that she was the children's biological mother, that they had been in her custody nearly all their lives, and that they were then in her custody. Ms. Oni acknowledged that Dr. Oni had adopted the children in 2010, and recounted that she had unsuccessfully attempted to set aside the adoption. Ms. Oni alleged that the children had no relationship with Dr. Oni, and that the children's few memories of him were negative. Ms. Oni claimed that she was a fit, capable, and qualified mother to the children and that it was in the children's best interest to remain with her. Thus, Ms. Oni sought to be awarded, among other things "sole physical and legal custody of the [c]hildren on a temporary and permanent basis."

Dr. Oni argued that Ms. Oni's petition was not viable for numerous reasons, including that Ms. Oni lacked standing because of her surrender of parental rights to the twins and his subsequent adoption of them; that Ms. Oni was thus not authorized to seek (as a third party) custodial rights against him (as the twins' parent); and that Oni I and Oni II , together with doctrines such as res judicata and collateral estoppel, foreclosed Ms. Oni's petition for custody.

The trial court consolidated the case initiated by Ms. Oni's custody petition with the case underlying Oni I and Oni II . And after conducting a hearing, the trial court entered the judgment contested in this appeal. Therein, the court described, "Legally, the Petitioner [Ms. Oni] is a stranger to the children, as she surrendered her parental rights to them in March 2010." The court further described, "While Respondent [Dr. Oni] is the legal parent, he is a virtual stranger to the children." The court found that "[r]emoving the[ ] children forever from the primary caregiver with whom they formed a primary bond and returning them to live with a virtual stranger is likely to cause them significant immediate and possible long-term emotional harm." The trial court concluded that "[t]he harm and damage that would befall the children if they are taken from the primary caregiver whom they have known and lived with almost their entire lives ... must be prevented." Discerning further the constitutional issues underlying the consolidated case, then determining that the case presented peculiar circumstances that "def[ied] the operation of the general rules of law," the trial court turned to its equity jurisdiction to award Ms. Oni "permanent custody" of the twins and to order Dr. Oni to "have no contact with them."

1. In several interrelated claims of error, Dr. Oni maintains that because Ms. Oni surrendered her parental rights to the twins and he subsequently adopted them, the trial court erred by invoking equity as a basis to grant custody to Ms. Oni. 5 For reasons explained below, we agree.

*779 "Parents 6 have a constitutional right under the United States and Georgia Constitutions to the care and custody of their children." Clark v. Wade , 273 Ga. 587 , 596, 544 S.E.2d 99 (2001) ; see In the Interest of M. F ., 298 Ga. 138 , 144-145, 780 S.E.2d 291 (2015) ("The presumption that children ordinarily belong in the care and custody of their parents is not merely a presumption of the statutory and common law, but it has roots in the fundamental constitutional rights of parents.").

Although in most instances it will be found that the legal right of the parent and the interest of the child are the same, if through misconduct or other circumstances it appears that the case is exceptional, and that the welfare of the child requires that it should be separated even from its parent, the parens patriae must protect the helpless and the innocent. ... Thus, in certain circumstances, the legislature may enact statutes that permit a child's interest to prevail over a parent's constitutional right to custody.

(Punctuation and footnote omitted.) Clark, 273 Ga. at 596 (IV), 544 S.E.2d 99 .

Georgia's General Assembly has enacted OCGA § 19-7-1 (b.1). 7 to govern custody disputes between parents and third parties. 8 That statutory provision survived constitutional scrutiny in Clark , 273 Ga. 587 , 544 S.E.2d 99 , wherein the Supreme Court of Georgia cited two of its aspects: "First, OCGA § 19-7-1 (b.1) expressly limits third parties who may seek custody to a specific list of the child's closest relatives, including an adoptive parent. Second, the statute defers to the fit parent's decision on custody by establishing a rebuttable presumption in favor of parental custody." Clark , 273 Ga. at 597 (IV), 544 S.E.2d 99 . 9

In its detailed order, the trial court correctly ascertained that Ms. Oni - having *780 surrendered her parental rights to the twins in 2010 - did not fall within any category delineated by OCGA § 19-7-1 (b.1) at the time she filed her custody petition in 2016. Nevertheless granting Ms. Oni's petition for custody, the trial court hinged its ruling on OCGA § 23-1-3, which provides in full: "Equity jurisdiction is established and allowed for the protection and relief of parties where, from any peculiar circumstances, the operation of the general rules of law would be deficient in protecting from anticipated wrong or relieving for injuries done." The trial court expressly reasoned in its order,

[T]he only category within which this case fits at this time is that of third party non-relative against legal parent. The "third party non-relative" in this case is actually the natural mother who raised the children and never intended that they be taken away from her. That is what makes the "peculiar circumstances" of this case so compelling.

Thus concluding that "this case presents 'peculiar circumstances' that defy the operation of the general rules of law and that compel the Court to invoke its equity jurisdiction to prevent a legally cognizable wrong arising from such circumstances," the trial court "ORDERED that Petitioner [Ms.] Oni shall have permanent custody of the minor [twins], and ... Dr. ... Oni shall have no contact with them."

Without question, the superior court is vested with general equitable powers. See Ga. Const. Art. VI, § IV, Para. I ; OCGA § 15-6-8 (2) ; see generally Brown v. Liberty Oil & Refining Corp ., 261 Ga. 214 , 215-216 (2) (b), 403 S.E.2d 806 (1991). But as the Supreme Court of Georgia has held:

[T]he first maxim of equity is that equity follows the law. Thus, a court of equity has no more right than a court of law to act on its own notion of what is right in a particular case. Where rights are defined and established by existing legal principles, they may not be changed or unsettled in equity. Although equity does seek to do complete justice, it must do so within the parameters of the law.

(Citations and punctuation omitted.) Dolinger v. Driver , 269 Ga. 141 , 143 (4), 498 S.E.2d 252 (1998).

Under well settled legal principles, when Ms. Oni's surrendered her parental rights to the twins, 10 she forfeited her custody rights to them. See Bozeman v. Williams , 248 Ga. 606 , 607, 285 S.E.2d 9 (1981) (citing Code § 74-108 (a), now codified as OCGA § 19-7-1 (b) ). And pursuant to well defined and established law, when Dr. Oni adopted the children, he gained the right to their custody. 11 See Clark , 273 Ga. at 596 (IV), 544 S.E.2d 99 ; see also Hastings , 291 Ga. at 782, 732 S.E.2d 272 . 12 While OCGA § 19-7-1 (b.1) provides for third parties to seek custody as against a parent, that statutory provision "expressly limits third parties ... to a specific list of the child's closest relatives."

*781 Clark , 273 Ga. at 597 (IV), 544 S.E.2d 99 . And Ms. Oni was not encompassed within that list when she filed her custody petition. See generally Stone v. Stone , 297 Ga. 451 , 454-455, 774 S.E.2d 681 (2015) ("[C]onstruing [ OCGA § 19-7-1 (b.1) ] as authorizing the State to require a fit and capable parent to share custody of his child with anyone except the child's other parent would raise significant constitutional concerns."); Walls v. Walls , 278 Ga. 206 , 207, n.3, 599 S.E.2d 173 (2004) ("Those third parties [allowed to seek custody of a child] are 'limited to grandparent, great-grandparent, aunt, uncle, great aunt, great uncle, sibling, or adoptive parent.' ") (quoting OCGA § 19-7-1 (b.1) ).

Consequently, Ms. Oni's petition for custody of the twins as against Dr. Oni had no basis "within the parameters of the law." Dolinger , 269 Ga. at 143 (4), 498 S.E.2d 252 ; see In the Interest of A. C ., 283 Ga. App. 743 , 747 (2) (a), 642 S.E.2d 418 (2007) (explaining that after the biological mother executed surrenders to her children, she was no longer a party to proceedings involving the children); Brooks , 194 Ga. App. at 373 (2), 390 S.E.2d 859 (explaining that the third party who was not a relative of either parent did not, by virtue of having developed emotional ties with the child after obtaining physical custody of the child, acquire standing to petition for custody against the child's father). Equity jurisdiction, therefore, could not be invoked to vindicate rights that Ms. Oni did not have. 13 See Wallace v. Wallace , 301 Ga. 195 , 199 (II), 800 S.E.2d 303 (2017) ("Equity does not permit a court to substitute its own notion of what is right in a particular case for a determination of what the law demands."); Williford , 299 Ga. at 18 (3), 785 S.E.2d 864 (noting "equity's general reluctance to interfere in cases involving personal and domestic matters that do not also implicate the plaintiff's legal status of personal or property rights") (emphasis supplied); Northlake Manor Condo. Assoc. v. Harvest Assets , 345 Ga. App. 575 , 583 (2), 812 S.E.2d 658 (2018) ("[E]quity is ancillary, not antagonistic, to the law and cannot be used to alter established legal rights[.]") (citation and punctuation omitted).

Given the foregoing constraints, 14 we must reverse the trial court's judgment, and remand this case for proceedings that are neither inconsistent with this case, nor inconsistent with our decisions in Oni I and Oni II . See generally In the Interest of A. C. , 283 Ga. App. at 745-748 (1) - (3), 642 S.E.2d 418 (rejecting biological mother's attempts to thwart the children's father from obtaining custody of the children, where she had executed a surrender of her parental rights to them); 15 Brooks , 194 Ga. App. at 367 (2), 390 S.E.2d 859 (concluding that the third party *782 who was not a relative of either parent did "not have a right to challenge the father's right to custody in favor of herself, or to do anything to promote her own interests and rights, for she has none").

2. We do not address Dr. Oni's remaining challenges to the custody award. 16

Judgment reversed and case remanded with direction.

Mercier and Brown, JJ., concur.