After a month of wiggling and twisting, this stubborn tooth finally came out.
Dougie is 7 (8 in July) and this is only the 3rd tooth he's lost, so we're a little excited!
p.s. Emma discovered the truth. She found the 'evidence' the other night! When I walked and caught her, she gave me a look of disbelief and said, "After all these years......"