I need a good excuse for ordering pizza?

I'm really really craving pizza, but my sister and her friend are over. My sister would be cool with it, but her friend is over ( and my sister is a TOTALLY different person when we have company). So if I order a pizza, her friend and herself will beg and bother me for some pizza and I don't want that. I do have an idea though. I wait outside and skate, then when he's there to drop off my pizza, I go to my favorite place in the neighborhood and eat it. But I need a back up plan if it doesnt work.