Jonie is a sales agent for Best Realty representing Bar None, Inc. in the sale of a large ranch to XLT, Inc. Jonie's firm also represents XLT under a buyer representation agreement. Best represented Bar None when it first purchased the ranch. Both parties have agreed to Best acting as intermediary in the transaction, but there will be no appointments, and Jonie will work with both parties. What is Jonie's duty to Bar None regarding disclosure of information related to Bar None's original purchase of the ranch?