ra’s agreement with Molycorp. The contractual liability is both limited and determinate. Molycorp argues elsewhere that there was no contract, but the jury found otherwise.
Accordingly, we hold that an employee may privately contract with his employer for disability benefits in addition to those provided by the Workmen’s Compensation Act.
II.TOTAL DISABILITY
Molycorp contends that Segura was not “disabled” as defined in the insurance policy. Since the policy was not introduced into evidence, we cannot consider the issue. Further, our review of the record shows abundant evidence to support a jury finding of disability.
III. MUTUAL MISTAKE OF FACT
The record reveals more than sufficient evidence to support a jury finding that there was no mutual mistake of fact in the formation of the April 1974 agreement between Molycorp and Segura.
IV. AGREEMENT TO PAY 50% OF SALARY WITHOUT SOCIAL SECURITY OFFSET
Molycorp’s basic contention is that the trial court erred in allowing Segura to testify as to oral statements of Mr. Riggs-bee, now deceased. The claim is that such statements are hearsay and not admissable to contest a written statement attributable to Riggsbee. Evidence Rule 801(d), N.M.S. A.1978 controls. The Riggsbee oral statement is not hearsay because it was an admission of the agent of a party-opponent under Rule 801(d)(2)(D). The record reflects sufficient evidence to justify the jury’s finding that there was a contract.
V.INSTRUCTIONS — THEORY OF CASE
Molycorp claims error by the refusal to grant certain Requested Instructions relating to such diverse issues as agency, ratification and definition of disability. Our review of the Instructions submitted to the jury indicates that each of these issues was properly included in the totality of the instructions. In Hole v. Womack, 75 N.M. 522, 407 P.2d 362 (1965), we held that where a party’s case is adequately presented to the jury, such party is not entitled to repetitious instructions belaboring the point. The court’s instructions were adequate to present both party’s theories of the case. Accordingly Molycorp’s claim must fail.
VI.EXISTENCE OF CONTRACT-FACT OR LAW
A. Determination of Existence and Terms of Contract.
Molyeorp contends the court erred by failing to find as a matter of law the existence and terms of a contract. In support of this contention, Molycorp cites Holland v. Lawless, 95 N.M. 490, 623 P.2d 1004 (Ct.App.) cert. denied, 95 N.M. 593, 624 P.2d 535 (1981), a case involving, inter alia, a dispute over whether an attorney-client relationship existed. The court held that the existence of a contract establishing such a relationship is generally an issue and question of law. However, that narrow holding cannot be enlarged to change the well-settled rule that when the existence of a contract is at issue and the evidence is conflicting or admits of more than one inference, it is for the jury to determine whether the contract did in fact exist. Pre-fit Door, Inc. v. Dor-Ways, Inc., 13 Ariz.App. 438, 477 P.2d 557 (1970); see also, Kirchner v. Laughlin, 4 N.M. 386, 17 P. 132 (1888).
It is the duty of the court to interpret the terms of a contract when these terms have been clearly established but when the terms of a contract are in controversy, it is for the jury to determine the terms and it is not the province of the court to instruct the jury what the terms are. 17A C.J.S. Contracts, § 611(a) (1963).
The central dispute in this case is whether a contract existed and, if so, its terms. The evidence was sufficient to establish an oral contract. Therefore, the court properly submitted the issue to the jury.