Thomas: Why does Xander owe you?
Gwen: I didn't hear you come in. Shouldn't you be upstairs, getting ready for the party?
Thomas: I'm already ready.
Gwen: So I see. And don't you look sharp indeed? Um, maybe you should be a good big brother and help little Charlotte get ready too.
Thomas: Grandpa Jack is helping her. Why does Xander owe you?
Gwen: Didn't anyone ever teach you that it's impolite to eavesdrop?
Thomas: I wasn't eavesdropping. You were talking loud. What did you do for him?
Gwen: What did I do for Xander? I just did him a favor, that's all.
Thomas: What kind of favor?
Gwen: My, you are persistent, aren't you?
Thomas: If persistent means curious, then yep.