Shallwe is a stranger.

From yesterday after lunch:
Daddy: Zoe, let's get a towel, shall we?
Zoe: Yea, we can!
Daddy: Hey, Zoe, when somebody says 'shall we,' you can answer, 'we shall.'
Zoe: Yea!
Daddy: Here. Let's practice. Let's go get a towel, shall we?
Zoe: No, I'm not Shallwe. I'm Zoe!

And a bonus story from 9/23:
At lunch, we were eating pork chops and baked potatoes. Zoe and Jason used barbeque sauce. About 2/3 of the way through lunch, Zoe said, "I don't like barbeque sauce." She'd been dipping potato chunks in it with her fingers and licking it off. Jason said, "Yea. You got too much, huh?" She nodded. "Barbeque sauce is one of those things we need to eat in moderation, Zoe." She looked at him and shook her head. Very matter-of-factly she stated, "No, Daddy. With a fork."