"I'll meet you at the car then."

And with that, he holds the front door open for Satoshi, certain that no one is looking for them. This violates the agreement with Chiyo about leaving her children out of the war, but then again, who is Rider to not encourage a person to have a bit of fun. Sitting around the stuffy Tohsaka household is one of the worst things he can imagine. Doing this, well, at least the boy will remember it in the future, after the war is done. That's a good enough legacy as any in this modern world.