Maryland agency law requires fiduciary duties to each client—loyalty, confidentiality, disclosure, obedience, reasonable care—but it does not prohibit a licensee from showing the same property to multiple buyer clients. A licensee must avoid disclosing one client’s confidential information (e.g., willingness to pay more) and provide fair, diligent service to each, but there is no exclusivity right entitling a buyer to first refusal unless contractually agreed. Therefore, no violation occurred when Renae showed the property to more than one client.