Ohio Rev. Code Ann. § 4735.65
(A) In representing a purchaser in an agency relationship, a licensee shall:
(B) A licensee does not breach any duty or obligation to the purchaser by showing the same properties to other purchasers or by preparing or presenting contemporaneous offers to purchase or lease the same property. Prior to preparing a contemporaneous offer, a licensee shall disclose that fact to all clients for whom the licensee is preparing, presenting, or has prepared or presented contemporaneous offers to purchase or lease the same property and shall refer to another licensee any client that requests such referral.