Blast from the past!
None of the Victor Turners travelling out fit the bill: a lecturer in medicine, a dentist, a cattle rancher, a merchant ...
There were, of course, a few dozen Joseph Turners travelling to Canada in the 10 years after the marriage.
There was only one Mr. Everett marriage ever in Helston district, 1861 ... and I refuse to believe the man's name was Ghiblim. That's what it appears to say, and indeed he is in censuses as such. No Everetts there in 1901 or 1911.
Anyway so now we know we are starting in Cornwall not Devon - the Plymouth registry office would be a place to go for anonymity if they were not really living there. And I see no 6 Jubilee Place, but 7 was a bit of a hive of bedsits from the look of it.
But we find no Joseph Turner born 1890-1900 in Cornwall either.
You know if somebody wanted to make a dog's breakfast of details ... there is an Everad John Turner (Anc'y mistranscribes as Evered), labourer, born c1894, in St Blazey, father Archibald a pedlar, living on Station Road. In 1901 Archibald was a plumber, which his other son was later; and in 1901 "Everad John" is called Everad George (Anc'y mistranscribes as Everard). No birth to match.
But aha, here that one is, and we do have "George" turning up (not John):
Births Mar 1894
Turner George Everad St. Austell 5c 91
Likely died in 1948 in St Austell. And married 1930 St Austell, a little late in life.
Is it possible that the story got all turned around, and what he really did was use a false name to marry, but was really the father?
Child named George, father named Mr. Everett ... could the father just have been George Everad?
Or ... maybe it was "Victor Joseph" who was the real father, just not Turner?
This one is a little interesting
Births Jun 1897
Turpin Joseph Victor Plymouth 5b 275
Marriages Dec 1922
TURPIN Joseph V Jervis Plymouth 5b 579
actually to Lillian Violet Jarvis 1898, 2 children
Deaths Dec 1943
Turpin Joseph V 46 Plymouth 5b 422
His father ... George ... was a building contractor.
It's all a little far-fetched but it has the grains of potential truth in it that could add up to something ... if JV Turpin's family refused to let him be ruined by it all, and Millicent's family found the paid-off patsy, just as reported, but with the names all just a little different.