Another Classic Grace Conversation

In the car just a few minutes ago - we had been discussing Uncle Kyle's girlfriend and how much Grace likes her. And then this:

Grace: "I love everybody, but I don't love my sister."
Mom: "Grace, you don't have a sister"
Grace: "I will in a few months when you have another baby."
Mom/Dad: LOL

Could she know something we don't know . . . I hope not!