[Dana]

You could just tell them that they ae visiting you and you want to show them some of the cool things they will see when they come back for vacation. Keep your story about having vacation there. While they ae visiting tell them about some of the cool stuff philly has to offer and purposely don't take them to a few and say you will have to catch it when you come back on vacation. If you change the story to much it may become suspicious so keep what you have going, but just tell them they are "visiting you" that time and "vacationing" there the next.