Okla. Stat. tit. 30 § 4-706
When a guardian has advanced for the necessary maintenance, support and education of his ward, an amount not disproportionate to the value of the estate or condition of life of the ward and the same is made to appear to the satisfaction of the court, by proper supporting documents and proofs, the guardian must be allowed credit therefor in his settlement. Whenever a guardian fails, neglects, or refuses to furnish suitable and necessary maintenance, support or education for his ward, the court may order the guardian to do so and enforce such order by proper process. Whenever any third person, at the request of the ward, supplies a ward with such suitable and necessary maintenance, support or education which is shown to have been done after refusal or neglect of the guardian to supply the same, the court may direct the guardian to pay therefor out of the estate of the ward, and may enforce such payment by due process.
Okla. Stat. tit. 30, § 4-706