Brunette Twin: "Mom, are you getting me a young architect's book for Christmas?"
Mom: "I'm not even thinking about Christmas yet."
Brunette Twin: "Really, because there's an email on your device about my Christmas presents."
Mom: "Why are you on my device?"
Brunette Twin: "You didn't password protect it. I'm just using my detective skills to see what might be under the Christmas tree."
Mom: "Stay off my device or you won't get anything for Christmas."
And, note to self -- password protect your device.