You can’t just call him “Not Mum”
From Doctor Who Series 6: Closing Time
They check different things - if they have two arms and legs (Ten), if they have fingers (Eleven), what age they are (River), but they always check their hair.
Doctor Who- Last Night
Moffat is a big fat bag of dicks. He rips your heart out, jumps about on it a bit and when he gives it back you still want more.
Dorium: “And Doctor Song? In prison all her days?”
Just that last gif of her ducking her head and the hair AHAHAHAHA