I KNEW it! All those ten dollar bills in the kids' birthday cards. The new jeans from Sam's Club. Something was up!
The other day, I was out with my parents, and the store confiscated a $10.00 bill from them! They said it was a counterfeit, and that it didn't "feel right." I looked it over myself, and it seemed okay to me, but they wouldn't give it back.
I've been teasing them non-stop since this episode. "So...they must have a pretty nice copier machine over at the Senior Condo Villiage!" And "A TEN? You're counterfeiting TENS? Come on, Dad, think big!"