Secret Ice Cream

Riddle: Leslie bought some ice cream on Friday. She kept all of the flavors a secret from her friends, although she wanted to enjoy it for dessert the next day. When Leslie woke up on Saturday, she didn't find the ice cream; someone had eaten it! The girl decided to ask her friends if they had eaten the ice cream. Geoff said that he was about to leave for work, and hadn't seen anything. Christian said that he was excited to try the new butterscotch ice cream on Saturday, albeit afraid that he was going to miss it. And Margot said that she didn't even know about the ice cream, but was also willing to try it. Who knows something?