I guess I'll have to post this again.....
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Onscreen? I didn't see that movie But the story with the Whizzer came first which shows that his wife Madeline was at Wundagore mountain. Much later, they had to make up a previously unknown wife for Magneto and then retrofit her into the story from Giant Sized Avengers. That makes for the extremely odd coinky dink of Magda running off to Wundagore Mountain at the exact time as Madeline Frank... and both about of them at the same stage of their pregnancies.