I just picked DD up from nursery and was handed a few bits from her tray including an invoice, handmade christmas card and a calender.
A popped us both in the car, came home, started dinner etc. I've just picked up the paperwork and looked at the calender. Its a handmade one with a paint handprint and the months printed and stuck down with nursery grade glitter glue. Its cute and shes only 2.5, I like these little nursery bits and bobs. There is a photo of her in the top corner playing in the sandpit. But.... Its not actually my DD! The little girl is strikingly similar and by god I had to look close! But she is not DD and wearing a TShirt DD hasn't got.
Do I hang it up and see if DH ever notices its not DD!! 
If he never does will any of the family notice?
What if doppleganger family is having the exact same problem right now...