As you said, she probably doesn't care for her pet(s) the same as you do (and all of us here at YT) but that did not give her the right to behave as she did! You are a better person than me for I would have said something to her, called her on her rudeness.
Prayers for Gizmo and that things go well and 4:00 is here before you know it!!! Let us know when he arrives back safe and sound in your loving arms
Suzi