However, that plot was quickly dropped, and eventually, in Vision and Scarlet Witch #4 (by Bill Mantlo, Rick Leonardi, Ian Akin and Brian Garvey), it was confirmed that Magneto was their father!

It’s not like she’s living at home with Magneto and eating cereal.” In addition to being the daughter of a known mutant terrorist, Polaris will also have to grapple with her own mental illness.