In previous posts you have indicated you're in a DADT marriage with a disapproving wife. If she does know of your cross dressing you may want to let your wife know what happened. It would prepare her if your daughter did see you and will talk to her mother. You may get some fallout, but less than if your wife find outs without any warning from you. Twenty minutes away is hardly any distance to retrieve something that had been forgotten. And, you can be fairly sure your wife knows that your using these absences to indulge Molly. As a matter of security we always have the outer storm door locked so anybody calling cannot just walk in with an extra key which both of our kids have for emergencies. Forces someone to rap on the door or use the bell.
