Like the couple in this story
At least choose a male corpse guys. Also, dyeing your hair black and pretending not to be your child's father? Oh please, my two year old would see through that one. Otherwise we'd have a western world full of traumatised kiddies who didn't recognise their parents after they'd been to the hairdresser. The Beckham's Nanny would be selling stories about the kids going to therapy because they didn't recognise Daddy because he's changed his hair style again.
Commonsense really isn't common.